Safety practical training device for chemical heat exchanger unit

Abstract

The utility model relates to the technical field of chemical practical training devices, and provides a chemical heat exchanger unit safety practical training device which comprises a heat exchanger body. One end of the conveying pipeline is a material inlet, and the other end is communicated with the heat exchanger body; the feeding pump is arranged on the conveying pipeline; the control valve group is arranged on the material conveying pipeline and is used for controlling opening and closing of the material conveying pipeline; the detection instrument is arranged on the material conveying pipeline; and the control valve group, the detection instrument and the feeding pump are all electrically connected with the controller. According to the technical scheme, the problems that most of chemical heat exchange teaching practical training devices in the prior art are experimental equipment, most of the chemical heat exchange teaching practical training devices only relate to performance parameter measurement and disassembly and assembly experiments, the content involved range is narrow, and safety education site practical training content is lacked are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical training device, specifically, relate to a chemical heat exchanger unit safety training device. BACKGROUND

[0002] In the chemical, energy, power, metallurgy, machinery, building and other industrial departments, often involves heat exchange problem, especially in the many processes and unit operations in the chemical production process, heating or cooling is needed, for example, chemical reaction usually is carried out at a certain temperature, in order to reach and keep a certain temperature, need to input or output heat from the reactor to it, for example, in evaporation, distillation, drying and other unit operations, all need to input or output heat to these equipment, in addition, the heat preservation of chemical equipment, the rational use of heat energy in the production process and the recovery of waste heat all involve heat transfer problem, thus it can be seen that the heat exchanger is one of the important chemical equipment in the chemical plant.

[0003] At present, the training about chemical unit such as heat exchanger is mostly carried out in the form of classroom teaching and written test, and the content is mostly theoretical knowledge such as principle, structure and operation steps, and actual production operation is less and cannot meet the high demand of students for training depth, range and consciousness due to the restriction of process, cost and safety, in recent years, some operations of safety training device are added in chemical safety education and training, the purpose of improving the safety consciousness and safety skill level of trainees is achieved through the operation of the training device, but most of the devices are experimental equipment, mostly only involve performance parameter determination and disassembly experiment, the content is narrow, lack of safety education field training content, however, there are many types in today's chemical industry, especially the chemical majors in various colleges and universities are not the same, safety accidents occur frequently in today's chemical industry, the importance of safety education is higher and higher, and higher requirements are put forward for the diversity of chemical safety education. UTILITY MODEL CONTENT

[0004] The utility model provides a chemical heat exchanger unit safety training device, solve the problem that the chemical heat exchange teaching training device in the related art is mostly experimental equipment, mostly only involves performance parameter determination and disassembly experiment, the content is narrow, lacks safety education field training content.

[0005] The technical scheme of the utility model is as follows:

[0006] A chemical heat exchanger unit safety training device, comprising:

[0007] The heat exchanger body;

[0008] The material conveying pipeline has one end for material inlet, and the other end is communicated with the heat exchanger body;

[0009] The feed pump is arranged on the material conveying pipeline;

[0010] A control valve group is arranged on the material conveying pipeline, and is used for controlling opening and closing of the material conveying pipeline.

[0011] A detection instrument is arranged on the material conveying pipeline.

[0012] A controller is electrically connected with the control valve group, the detection instrument and the material feeding pump.

[0013] Optionally, the material conveying pipeline comprises:

[0014] A hot material feeding pipeline, one end of which is used for feeding hot material, and the other end of which is communicated with the shell inlet of the heat exchanger body;

[0015] A hot material discharging pipeline, one end of which is communicated with the shell outlet of the heat exchanger body, and the other end of which is used for discharging the hot material after heat exchange;

[0016] A cold material feeding pipeline, one end of which is used for feeding cold material, and the other end of which is communicated with the tube inlet of the heat exchanger body;

[0017] A cold material discharging pipeline, one end of which is communicated with the tube outlet of the heat exchanger body, and the other end of which is used for discharging the cold material after heat exchange.

[0018] Optionally, the material feeding pump has a plurality of material feeding pumps, and the plurality of material feeding pumps are arranged on the hot material feeding pipeline and the cold material feeding pipeline respectively, and are used for feeding material into the heat exchanger body.

[0019] Optionally, the hot material feeding pipeline and the cold material feeding pipeline have the same structure.

[0020] Optionally, the control valve group comprises:

[0021] A first stop valve arranged on the hot material feeding pipeline on the feeding side of the material feeding pump;

[0022] A pilot valve arranged between the first stop valve and the feeding side of the material feeding pump;

[0023] A check valve arranged on the outlet side of the material feeding pump;

[0024] A pneumatic regulating valve arranged on the hot material feeding pipeline on the discharging side of the material feeding pump.

[0025] Optionally, the detection instrument comprises:

[0026] A vacuum gauge arranged between the first stop valve and the material feeding pump;

[0027] A pump outlet pressure gauge, a thermometer, a first pressure gauge, a flow meter and a temperature transmitter are sequentially arranged on the hot material feeding pipe from the outlet side of the feeding pump to the shell side inlet of the heat exchanger body.

[0028] Optionally, the device further comprises:

[0029] A filter is arranged between the first stop valve and the inlet side of the feeding pump.

[0030] Optionally, an exhaust valve, a thermometer and a second stop valve are arranged on the hot material discharging pipe.

[0031] Optionally, the device further comprises:

[0032] A condensate discharge pipe is arranged on the hot material discharging pipe.

[0033] The working principle and advantages of the device are as follows:

[0034] In the device, the material is conveyed to the heat exchanger through the material conveying pipe, the material flow path in the actual chemical production is simulated, and the students can be familiar with the movement of the chemical material in the heat exchanger unit. The feeding pump is arranged to ensure that the material can stably enter the system, and the working state, such as the rotating speed, of the feeding pump can be adjusted through the controller, so as to control the flow and pressure of the material, and enable the students to master the working condition of the heat exchanger under different flow and pressure conditions. The control valve group can flexibly control the opening and closing of the material conveying pipe, and is convenient for various operations in the practical training process, such as closing the corresponding valve when simulating the pipe blockage, maintenance and the like, and the practicality and diversity of the practical training are enhanced. The detection instrument can real-timely monitor various parameters, such as the pressure, temperature and flow, on the material conveying pipe, and after the data are fed back to the controller, on one hand, the feeding pump and the control valve group can be controlled to realize the automatic control, and on the other hand, the students are provided with intuitive parameter change information, which is helpful for them to understand the physical and chemical change rules in the chemical process, and improve the understanding and application ability of the chemical principle. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above features, technical characteristics, advantages and implementation modes of the device will be further described in the following preferred embodiments in a clear and understandable manner in combination with the drawings.

[0036] Figure 1 It is a whole structure schematic view of the practical training device.

[0037] In the figure: 1, heat exchanger body; 2, material conveying pipeline; 201, hot material feeding pipeline; 211, hot material discharging pipeline; 202, cold material feeding pipeline; 212, cold material discharging pipeline; 3, feeding pump; 4, control valve group; 401, first stop valve; 402, guiding valve; 403, check valve; 404, pneumatic regulating valve; 5, detection instrument; 501, vacuum gauge; 502, pump outlet pressure gauge; 503, thermometer; 504, first pressure gauge; 505, flowmeter; 506, temperature transmitter; 6, filter; 7, second stop valve; 8, condensate discharge pipeline. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor, and other embodiments can also be obtained.

[0039] In order to make the drawing simple, only the parts related to the present application are shown in each drawing, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0040] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0042] Reference Figure 1For an embodiment of the utility model, propose a kind of chemical heat exchanger unit safety practical training device, including heat exchanger body 1;Material inlet is at one end of material pipe, and the other end is communicated with heat exchanger body 1;Feed pump 3 is set on material pipe 2;Control valve group 4 is set on material pipe 2, and control valve group 4 is used to control the opening and closing of material pipe 2;Detection instrument 5 is set on material pipe 2;Controller control valve group 4, detection instrument 5 and feed pump 3 are electrically connected with controller.

[0043] In the above scheme, heat exchanger body 1 adopts column tube heat exchanger, and the material is stainless steel, the shell is firm, and the internal heat exchange tube is arranged neatly, which can effectively realize the heat exchange between hot material and cold material. Select programmable logic controller (PLC), with multiple input and output interfaces, receive signals from detection instrument 5, such as temperature, pressure, flow, etc., and control the opening of control valve group 4 and the speed of feed pump 3 according to the preset program, to realize automatic control. At the same time, the controller is also connected with display screen, which can directly display system running parameters and alarm information.

[0044] A complete practical training system architecture is constructed. Heat exchanger body 1 as the core heat exchange component provides students with an intuitive heat exchange process research object. Through material pipe 2, the material is delivered to the heat exchanger, simulating the material flow path in actual chemical production, so that students can be familiar with the movement of chemical materials in the heat exchanger unit. The setting of feed pump 3 ensures that the material can enter the system stably, and the working state of feed pump 3 such as speed can be adjusted by the controller, so as to control the flow and pressure of the material, and enable students to master the working condition of the heat exchanger under different flow and pressure conditions. Control valve group 4 can flexibly control the opening and closing of material pipe 2, which is convenient for various operations in the practical training process, such as closing the corresponding valve when simulating pipe blockage, maintenance and other scenes, which enhances the authenticity and diversity of practical training. Detection instrument 5 monitors various parameters on material pipe 2 in real time, such as pressure, temperature, flow, etc. After these data are fed back to the controller, on the one hand, it can be used to control feed pump 3 and control valve group 4 to realize automatic control, and on the other hand, it provides students with intuitive parameter change information, which helps them understand the physical and chemical change law in chemical process, and improves their understanding and application ability of chemical principle.

[0045] Further, material pipe 2 includes hot material inlet pipe 201, one end for hot material, the other end is communicated with the shell side inlet of heat exchanger body 1;Hot material outlet pipe 211, one end is communicated with the shell side outlet of heat exchanger body 1, the other end is used for discharging the hot material after heat exchange;Cold material inlet pipe 202, one end for cold material, the other end is communicated with the tube side inlet of heat exchanger body 1;Cold material outlet pipe 212, one end is communicated with the tube side outlet of heat exchanger body 1, the other end is used for discharging the cold material after heat exchange.

[0046] In the above scheme, one end of the hot material feeding pipe 201 is connected with a hot material source, and the other end is in communication with the shell side inlet of the heat exchanger body 1, so as to ensure that the hot material enters the shell side for heat exchange; the hot material discharging pipe 211 is connected with the shell side outlet, so as to discharge the hot material after heat exchange. The cold material feeding pipe 202 is connected with a cold material source and leads to the tube side inlet of the heat exchanger body 1, and the cold material discharging pipe 212 leads out from the tube side outlet, so as to meet the requirements of the circulation and heat exchange path of the hot and cold materials in the heat exchanger.

[0047] Through observation and operation of different feeding and discharging pipes, the students can deeply understand the heat exchange process of the hot and cold materials in the heat exchanger, including the heat transfer direction, temperature change trend, etc. In the training process, by changing the flow, temperature and other parameters of the hot and cold materials, the influence of these factors on the heat exchange effect can be studied, so as to provide a theoretical and practical basis for the operation and optimization of the heat exchanger in actual chemical production. At the same time, the clear pipe layout is also convenient for equipment maintenance and fault troubleshooting. When problems such as abnormal heat exchange occur, the students can quickly locate the possible problem pipe link, so as to improve the ability to solve actual problems.

[0048] Further, the feeding pump 3 has a plurality of feeding pumps 3, and the plurality of feeding pumps 3 are arranged on the hot material feeding pipe 201 and the cold material feeding pipe 202, respectively. The feeding pump 3 is used to transport the material into the heat exchanger body 1.

[0049] In the above scheme, the hot material feeding pipe 201 is provided with a hot material feeding pump 3, and the cold material feeding pipe 202 is provided with a cold material feeding pump 3. According to the actual production scale and flow demand, a plurality of hot material feeding pumps 3 and cold material feeding pumps 3 can be arranged in parallel operation, for example, in a large-scale chemical production training scene, three hot material feeding pumps 3 and three cold material feeding pumps 3 are arranged to meet the transportation demand of a large amount of material.

[0050] The transportation amount of the material can be adjusted according to the production scale and process requirements. A plurality of feeding pumps 3 can be used in parallel or in series, for example, in a large-scale production training scene, a plurality of feeding pumps 3 can be started at the same time to increase the flow of the material, so as to meet the high-load production demand; in some cases where the flow of the material needs to be accurately controlled, the working state or combination mode of different feeding pumps 3 can be adjusted to realize fine flow control. In addition, when a feeding pump 3 fails, other feeding pumps 3 can continue to work to ensure the continuity of the training, and also enable the students to understand the importance of equipment backup and emergency treatment in actual chemical production, so as to improve their ability to deal with sudden equipment failure.

[0051] Further, the hot material feeding pipe 201 and the cold material feeding pipe 202 have the same structure.

[0052] In the above scheme, the hot material feeding pipeline 201 and the cold material feeding pipeline 202 have similarities in structure, both of which are composed of a pipeline body, a connecting part, a valve and an instrument installation interface, etc. In the selection of pipeline materials, the hot material feeding pipeline 201 selects a high-temperature-resistant material according to the characteristics of the hot material, and the cold material feeding pipeline 202 selects a low-temperature-resistant material according to the properties of the cold material; in the configuration of valves and instruments, both of them are provided with stop valves, pilot valves 402, check valves 403 and other valves on both sides of the feeding pump 3, as well as vacuum gauges 501, pressure gauges, thermometers 503 and other detection instruments 5, except that the specific range and applicable temperature range are different.

[0053] For students, it is easier to understand and master the working principle and operation method of the pipeline system, because they do not need to learn two completely different pipeline structures, reducing the learning difficulty and helping to improve the training effect.

[0054] Further, the control valve group 4 includes a first stop valve 401 arranged on the hot material feeding pipeline 201 on the feeding side of the feeding pump 3, a pilot valve 402 arranged between the first stop valve 401 and the feeding side of the feeding pump 3, a check valve 403 arranged on the outlet side of the feeding pump 3, and a pneumatic regulating valve 404 arranged on the hot material feeding pipeline 201 on the outlet side of the feeding pump 3.

[0055] In the above scheme, on the hot material feeding pipeline 201, the first stop valve 401 on the feeding side of the hot material feeding pump 3, the ball valve between the first stop valve 401 and the feeding side of the feeding pump 3 is the pilot valve 402, the swing check valve 403 on the outlet side of the feeding pump 3 meets the setting requirements of the check valve 403, and the pneumatic regulating valve 404 on the outlet side can accurately regulate the flow of the hot material according to the instructions of the controller.

[0056] The first stop valve 401 can completely cut off the feeding of the hot material in equipment maintenance, repair or emergency, ensuring the safety of operation. The presence of the pilot valve 402 facilitates the discharge of residual materials in the pipeline when the pipeline needs to be emptied, cleaned or subjected to other maintenance operations, avoiding the impact of material residues on subsequent operations or equipment. The check valve 403 effectively prevents backflow of materials, protects the feeding pump 3 and the entire system from the impact of reverse pressure, and ensures stable operation of the system. The pneumatic regulating valve 404 can accurately regulate the flow of the hot material according to the signal of the controller, realizing automatic control. In the practical training process, students can set different flow parameters through the controller, observe the action of the pneumatic regulating valve 404 and the change of the flow in the pipeline, and learn how to optimize the chemical production process through automatic control means to improve production efficiency and product quality.

[0057] Further, the detection instrument 5 includes a vacuum gauge 501 arranged between the first stop valve 401 and the feed pump 3; and a pump outlet pressure gauge 502, a thermometer 503, a first pressure gauge 504, a flowmeter 505 and a temperature transmitter 506 are arranged in sequence on the hot material feeding pipeline 201 from the outlet side of the feed pump 3 to the inlet of the shell side of the heat exchanger body 1.

[0058] In the above scheme, the vacuum gauge 501 can monitor the vacuum degree of the hot material feeding pipeline 201, which is crucial for some chemical reactions or operations that need to be carried out under vacuum conditions. Students can understand the influence of vacuum degree on material conveying and heat exchange process by observing the numerical change of the vacuum gauge 501. The pump outlet pressure gauge 502 provides pressure information of the outlet of the feed pump 3, which helps to judge the working state of the feed pump 3 and the pipeline resistance. The thermometer 503 and the temperature transmitter 506 can measure the temperature of the hot material at different positions in real time. By comparing the inlet and outlet temperatures, students can intuitively understand the heat exchange effect of the heat exchanger. The flowmeter 505 accurately measures the flow of the hot material. Combined with temperature and pressure data, students can perform heat balance calculation and other operations to deeply understand the principle of energy conservation in chemical processes. The first pressure gauge 504 further supplements the pipeline pressure monitoring point, providing more comprehensive pressure data support for the safe and stable operation of the system.

[0059] Further, a filter 6 is arranged between the first stop valve 401 and the inlet side of the feed pump 3.

[0060] In the above scheme, the filter 6 can effectively remove impurity particles in the hot material, preventing these impurities from entering the feed pump 3 and the heat exchanger body 1, and avoiding problems such as equipment wear, pipeline blockage or affecting heat exchange efficiency caused by impurity accumulation. In chemical production, the purity of raw materials has a great influence on the production process and product quality. By setting the filter 6 and regularly cleaning or replacing the filter screen, students can understand the importance of keeping the material pure and the corresponding operation method, while also prolonging the service life of the equipment and reducing the equipment maintenance cost.

[0061] Further, an exhaust valve, a thermometer 503 and a second stop valve 7 are arranged on the hot material outlet pipeline 211.

[0062] In the above scheme, the exhaust valve can exhaust the gas that may be generated during the heat exchange process of the hot material, avoiding the accumulation of gas in the pipeline affecting the material flow and heat exchange effect, and ensuring the stable operation of the system. The thermometer 503 is used to monitor the temperature of the hot material after heat exchange. Students can evaluate the performance and heat exchange efficiency of the heat exchanger by comparing the inlet and outlet temperatures. The second stop valve 7 is convenient for cutting off the pipeline when the equipment needs to be maintained or the hot material needs to be stopped, ensuring the safety and convenience of operation.

[0063] Further, the condensate pipe 8 is arranged on the hot material discharge pipeline 211.

[0064] In the above scheme, during the hot material discharge process, condensate may be generated due to temperature change or material composition characteristics. The arrangement of the condensate pipe 8 can timely discharge the condensate, prevent the condensate from accumulating in the pipeline to cause pipeline corrosion, blockage or affect the normal conveying of the material. By observing and operating the condensate pipe 8, the students can understand the method and importance of handling the condensate in the chemical production process, and improve their response ability to the actual problems in the chemical production.

[0065] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A chemical heat exchanger unit safety practical training device, characterized in that, The utility model relates to a heat exchanger body (1); Material conveying pipe (2), one end is material import, the other end with heat exchanger body (1) intercommunication; Feed pump (3) is arranged on material conveying pipe (2); Control valve group (4) is arranged on material conveying pipe (2), control valve group (4) is used for controlling the opening and closing of material conveying pipe (2); Detection instrument (5) is arranged on material conveying pipe (2); Controller, control valve group (4), detection instrument (5) and feed pump (3) are electrically connected with controller. Material conveying pipe (2) includes:

2. The chemical heat exchanger unit safety practical training device according to claim 1, characterized in that, Hot material feeding pipe (201), one end is used for passing into hot material, the other end is communicated with the shell side import of heat exchanger body (1); Hot material discharging pipe (211), one end is communicated with the shell side export of heat exchanger body (1), the other end is used for discharging the hot material after heat exchange; Cold material feeding pipe (202), one end is used for passing into cold material, the other end is communicated with the tube side import of heat exchanger body (1); Cold material discharging pipe (212), one end is communicated with the tube side export of heat exchanger body (1), the other end is used for discharging the cold material after heat exchange. Feed pump (3) has several, several feed pump (3) is arranged on hot material feeding pipe (201) and cold material feeding pipe (202) respectively, and feed pump (3) is used to convey material to heat exchanger body (1).

3. The chemical heat exchanger unit safety practical training device according to claim 2, characterized in that, Hot material feeding pipe (201) and cold material feeding pipe (202) are same in structure.

4. The chemical heat exchanger unit safety practical training device according to claim 2, characterized in that, Control valve group (4) includes:

5. The chemical heat exchanger unit safety practical training device according to claim 2, characterized in that, First stop valve (401) is arranged on hot material feeding pipe (201) on the material side of feed pump (3); Guide valve (402) is arranged between first stop valve (401) and the material side of feed pump (3); Check valve (403) is arranged on the export side of feed pump (3); Pneumatic regulating valve (404) is arranged on hot material feeding pipe (201) on the discharge side of feed pump (3). Detection instrument (5) includes:

6. The chemical heat exchanger unit safety practical training device according to claim 5, characterized in that, Vacuum gauge (501) is arranged between first stop valve (401) and feed pump (3); Pump outlet pressure gauge (502), thermometer (503), first pressure gauge (504), flowmeter (505) and temperature transmitter (506) are sequentially arranged on hot material feeding pipe (201) from the export side of feed pump (3) to the shell side import of heat exchanger body (1). Still include:

7. The chemical heat exchanger unit safety practical training device according to claim 5, characterized in that, Filter (6) is arranged between first stop valve (401) and the import side of feed pump (3). Exhaust valve, thermometer (503) and second stop valve (7) are arranged on hot material discharging pipe (211).

8. The chemical heat exchanger unit safety practical training device according to claim 2, characterized in that, Still include:

9. The chemical heat exchanger unit safety practical training device according to claim 2, characterized in that, Condensate pipe (8) is arranged on hot material discharging pipe (211). ​

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