Heat conduction oil sampler with heat dissipation device

Abstract

The utility model discloses a heat conduction oil sampler with a heat dissipation device, which belongs to the technical field of chemical production equipment and comprises a base for supporting; a protective cover is arranged on the base, a heat exchanger is arranged in the protective cover, a heat exchange coil is arranged in the heat exchanger, and the upper portion of the heat exchanger is communicated with a valve a through a pipeline a. And the lower part of the heat exchanger is communicated with the valve b through a pipeline b, and the pipeline b is also provided with a sampling port.

Description

Technical Field

[0001] The utility model belongs to the technical field of polystyrene production equipment, and in particular relates to a heat-conducting oil sampler with a heat dissipation device. Background Art

[0002] Thermal oil is a special oil with good thermal stability used for indirect heat transfer. Thermal oil products are mainly used in organic heat carrier furnaces in heat transfer processes. Heat transfer process is a process in which materials are heated by indirect or direct heat transfer in industrial devices to dry the materials or provide heat for chemical reactions of the materials. Due to its uniform heating, accurate temperature control, good heat transfer effect, energy saving, convenient transportation and operation, it has been widely used in various occasions in recent years, and its uses and usage are increasing.

[0003] When the heat transfer oil is operated at high temperature for a long time, thermal cracking and polymerization reactions may occur, resulting in the breakage and recombination of the molecular chain, which in turn increases the volatility of the heat transfer oil and reduces the flash point. Finally, polymers are formed, which are difficult to melt and dissolve. This not only affects the fluidity of the oil, but also reduces the thermal conductivity. Since the heat transfer oil itself contains some impurities and moisture, when it is operated at high temperature, the moisture and impurities in the heat transfer oil will reduce the stability of the heat transfer oil and promote the occurrence of coking; moisture can cause hydrolysis reactions, produce acidic substances, and accelerate the decomposition and oxidation of the heat transfer oil. When the heat transfer oil comes into contact with oxygen in the air at high temperature, oxidation reactions will occur to form oxidation products. These polymers and oxidation products may be deposited on the surface of the heat transfer oil pipeline and equipment, gradually forming coke. The accumulation of coke will cause the fluidity of the heat transfer oil to decrease, increase the resistance of the pipeline and equipment, reduce the heat transfer efficiency, and even cause the risk of equipment failure and fire.

[0004] In addition, when the flame of the heat medium furnace is improperly controlled and the flame licks the pipe, the heat transfer oil is heated to high temperature locally in the pipe and cracked. The gaseous light components produced by the cracking are not removed from the system in time, but circulate in the system, causing the circulation pump to begin to cavitate slightly. The slight cavitation then causes the heat transfer oil flow in the heat medium furnace to fluctuate, further causing the system heat transfer oil to overheat and crack locally. The vicious cycle of locally overheated and cracked heat transfer oil causes flow fluctuations, and this continuous vicious cycle eventually leads to a serious deterioration in the quality of the heat transfer oil in the entire system.

[0005] According to the thermal stability test, if the temperature of the heat transfer oil is high during use, the main fluid will undergo accelerated cracking; for the same oil, the thermal cracking rate will also deviate if the temperature is different. For example, for a certain oil:

[0006] When T=280℃, the thermal cracking rate is 3-5% / year; when T=300℃, the thermal cracking rate is 41% / year; when T=320℃, the thermal cracking rate is 56% / year.

[0007] Generally, the thermal cracking rate of heat transfer oil is controlled within 10% / year. The control indicators for oil scrapping and replacement are: closed cup flash point <60℃, viscosity change value >15% (compared with the new oil at the beginning of use), residual carbon >1.5%, acid value >1.5mgKOH / g. Utility Model Content

[0008] The utility model device aims to provide a heat transfer oil sampler with a heat dissipation device. In view of the characteristics of the heat transfer oil and the specified technical indicators, it is necessary to regularly sample and analyze the high-temperature heat transfer oil in operation; if the high-temperature heat transfer oil is in direct contact with personnel, there will be a risk of being scalded or splashed by the high temperature, thereby increasing the risk for the sampling personnel.

[0009] To solve the above problems, the utility model is implemented through the following technical solutions.

[0010] A heat transfer oil sampling device with a heat dissipation device, characterized in that it comprises a base, the base is used to support the entire device, and the material of the base is preferably stainless steel.

[0011] A protective cover is provided on the base, which is used to isolate the heat exchanger and prevent personnel from contacting the high-temperature thermal oil pipeline to prevent operators from accidentally touching and being scalded by high temperature, thereby ensuring people's safety.

[0012] There is a heat exchanger inside the protective cover. The heat exchanger is used to cool down the high-temperature hot oil. There is a heat exchange coil inside the heat exchanger.

[0013] The upper part of the heat exchanger is connected to valve a through pipeline a;

[0014] The lower part of the heat exchanger is connected to valve b through pipeline b, and a sampling port is also provided on pipeline b.

[0015] Preferably: in order to improve the safety of the equipment, an exhaust valve a is provided on the pipeline a, and an exhaust valve b is provided on the pipeline b. Before starting the circulation, the thermal oil sampler needs to be opened to exhaust the air to prevent splashing and scalding the operator during sampling.

[0016] Furthermore, the thermal oil sampler includes a sampler inlet valve, a sampler inlet pipeline exhaust valve, a sampling port, a protective cover base, a protective cover shell, a protective cover top cover, a heat exchanger, a sampler outlet pipeline exhaust valve, and a sampler outlet valve.

[0017] Furthermore: the valve a is connected to the high-temperature oil expansion tank through a pipeline, the high-temperature oil expansion tank is connected to the heat-using equipment through a pipeline, the heat-using equipment is connected to the heat-conducting oil boiler through a pipeline, the heat-conducting oil boiler is connected to the circulation pump through a pipeline, and the circulation pump (10) is connected to the valve a and the high-temperature oil expansion tank through a pipeline to form a heat-conducting oil circuit.

[0018] The advantages and positive effects of the utility model are:

[0019] Safe and reliable: The sampler has a protective cover base for fixing, and a protective cover shell and a protective cover top cover to isolate the heat exchanger, which can prevent personnel from contacting the high-temperature thermal oil pipeline. At the same time, the heat exchanger can dissipate the heat of the high-temperature thermal oil, from 60°C at the pump outlet to room temperature, thereby reducing the risk of sampling media and improving the safety of sampling operations.

[0020] Changing the sampling method: Changing the traditional online sampling method, opening the inlet and outlet valves of the sampler for full circulation, while cooling, and opening the sampler for sampling after the temperature drops to room temperature, thereby increasing the sampling efficiency.

[0021] The sample is not contaminated: This sampling method is a closed sampling method. The sample circulates in the system and does not need to be replaced by a barrel. No material discharge will be generated, thus avoiding the pollution of the environment by the material. The sampler has high feasibility and is suitable for comprehensive promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the work flow chart of the utility model.

[0023] In the figure: 1. valve b; 2. exhaust valve b; 3. sampling port; 4. base; 5. protective cover; 6. heat exchange coil; 7. heat exchanger; 8. exhaust valve a; 9. valve a; 10. circulating pump; 11 thermal oil boiler; 12 heat-using equipment; 13 high-temperature oil expansion tank. DETAILED DESCRIPTION

[0024] 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. It is obvious that 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.

[0025] Example 1

[0026] See also Figure 1 :

[0027] The utility model is a heat transfer oil sampler device with a heat dissipation device, comprising a base 4, a protective cover 5 is arranged on the base 4, a heat exchanger 7 is arranged inside the protective cover 5, a heat exchange coil 6 is arranged inside the heat exchanger 7, the upper part of the heat exchanger 7 is connected to the valve a9 through the pipeline a, and the lower part of the heat exchanger 7 is connected to the valve b1 through the pipeline b;

[0028] An exhaust valve a8 is provided on pipeline a, an exhaust valve b2 is provided on pipeline b, and a sampling port 3 is also provided on pipeline b.

[0029] The working principle of the utility model is as follows: when performing sampling operation, the operator first slightly opens valve b1 and opens exhaust valve b2 to discharge the gas in the heat transfer oil of the front pipeline;

[0030] Close the exhaust valve b2 of the sampler inlet pipeline, open the exhaust valve a8, and exhaust the gas in the heat exchanger 7.

[0031] After the exhaust is completed, open valve a9 and valve b1 to circulate the heat transfer oil. The exhaust operation is to prevent the heat transfer oil from splashing due to gas when the operator is taking samples.

[0032] After the heat transfer oil circulates in the heat exchanger for a certain period of time, the heat exchanger lowers the temperature of the heat transfer oil to room temperature, and then opens the sampling port 3 to sample the heat transfer oil.

[0033] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A thermal oil sampler with a heat dissipation device, characterized in that: It comprises a base (4), and the base (4) is used for supporting; A protective cover (5) is provided on the base (4), a heat exchanger (7) is provided inside the protective cover (5), and a heat exchange coil (6) is provided inside the heat exchanger (7). The upper part of the heat exchanger (7) is connected to the valve a (9) through the pipeline a; The lower part of the heat exchanger (7) is connected to the valve b (1) through the pipeline b, and the pipeline b is also provided with a sampling port (3).

2. A thermal oil sampler with a heat dissipation device as claimed in claim 1, characterized in that: The pipeline a is provided with an exhaust valve a (8), and the pipeline b is provided with an exhaust valve b (2).

3. A thermal oil sampler with a heat dissipation device as claimed in claim 1 or 2, characterized in that: The valve a (9) is connected to a high-temperature oil expansion tank (13) through a pipeline, the high-temperature oil expansion tank (13) is connected to a heat-using device (12) through a pipeline, the heat-using device (12) is connected to a heat-conducting oil boiler (11) through a pipeline, the heat-conducting oil boiler (11) is connected to a circulation pump (10) through a pipeline, and the circulation pump (10) is connected to the valve a (9) and the high-temperature oil expansion tank (13) through a pipeline to form a heat-conducting oil circuit.

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