A self-decompression and self-temperature reduction sampling device

Abstract

The invention relates to the field of coking dry quenching boilers and boiler water sampling technology, and discloses a self-decompression and self-superheating sampling device, comprising: a self-decompression unit, comprising a plurality of reversely installed Tesla high-temperature pressure reducing valves, the Tesla high-temperature pressure reducing valves are reversely installed on the side of the high-temperature and high-pressure medium pipeline of the dry quenching boiler; the high-temperature and high-pressure medium of the quenching boiler flows in the first high-temperature and high-pressure medium and the second high-temperature and high-pressure medium; the self-superheating unit comprises a refrigerant supply pipeline and a spiral cooling pipeline; the first low-temperature cooling medium and the second low-temperature cooling medium flow pipeline flow in the refrigerant supply pipeline, the interior of the spiral cooling pipeline comprises a plurality of low-temperature cooling medium flow pipelines and high-temperature medium flow pipelines that are spirally wound and physically separated; a dry quenching boiler sampling pipeline, the dry quenching boiler sampling pipeline is connected to the high-temperature and high-pressure medium pipeline of the dry quenching boiler through the self-superheating unit, and the outlet is connected to the manual / automatic sampling unit. A working method of the self-decompression and self-superheating sampling device is also disclosed.

Description

Technical Field

[0001] The invention relates to the field of coking dry quenching boilers and boiler water sampling technology, and in particular to a self-decompression and self-temperature reduction sampling device, which is used in a boiler water sampling method of a dry quenching boiler. The self-decompression of sample water is utilized, and low-temperature sample water is used to reduce the temperature of high-temperature sample water, so that energy can be saved and sampling is convenient in the field of dry quenching. Background Art

[0002] CDQ technology is the general trend of domestic coking development. Currently, most coke ovens are equipped with CDQ. CDQ boiler is an important component of CDQ using waste heat from coking. Its own stable operation is not only related to the operation of the boiler system, but also affects the stable operation of the CDQ oven system. Therefore, boiler operation is extremely important.

[0003] Since the sampling pipeline of the CDQ boiler is connected to the high-temperature and high-pressure medium pipeline, there is a safety hazard in high-temperature and high-pressure operation. The commonly used technology at present is to introduce demineralized water to cool the high-temperature sample water and sample steam, and then use circulating water to cool it. This method is not only complex in process, but also wastes a lot. Summary of the invention

[0004] The purpose of the present invention is to provide a self-decompression and self-temperature reduction sampling device, which can reduce pressure and adjust temperature automatically, has a relatively simple process and has low requirements on cooling medium.

[0005] The first aspect of the present invention is to provide a self-decompression and self-temperature reduction sampling device, comprising:

[0006] A self-decompression unit, the self-decompression unit comprising a plurality of Tesla high-temperature pressure reducing valves (1) installed in opposite directions, the Tesla high-temperature pressure reducing valves (1) being installed in opposite directions on the side of a high-temperature and high-pressure medium pipeline of a dry coke quenching boiler; a first high-temperature and high-pressure medium (31) and a second high-temperature and high-pressure medium (32) flowing in the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler; and high-temperature media in the Tesla high-temperature pressure reducing valves (1) flowing in the same direction;

[0007] A self-cooling unit (2), the self-cooling unit (2) being a self-cooling heat exchange unit, comprising a refrigerant supply pipeline and a spiral cooling pipeline; a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42) flow in the refrigerant supply pipeline, the interior of the spiral cooling pipeline comprising a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines, the low-temperature cooling medium flow pipeline and the high-temperature medium flow pipeline being spirally wound around each other and physically separated;

[0008] A dry quenching boiler sampling pipeline, wherein the dry quenching boiler sampling pipeline is connected to the dry quenching boiler high-temperature and high-pressure medium pipeline through the self-cooling unit (2), the inlet of the dry quenching boiler sampling pipeline is connected to the outlet of the self-cooling unit (2), and the outlet of the dry quenching boiler sampling pipeline is connected to the manual / automatic sampling unit.

[0009] Preferably, each high-temperature and high-pressure sampling point uses a group of the Tesla high-temperature pressure reducing valves (1); or each high-temperature and high-pressure sampling point uses one or more multi-stage series-connected Tesla high-temperature pressure reducing valves (1), thereby ensuring the pressure reducing effect under different pressures to meet the medium pressure reducing requirements of dry coke quenching boilers with different energy efficiencies.

[0010] Preferably, one side of the Tesla high-temperature pressure reducing valve (1) is connected to a high-temperature and high-pressure sampling point of a high-temperature and high-pressure medium pipeline of the dry coke quenching boiler, and the other side is connected to an outlet pipeline of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler, so that the first high-temperature and high-pressure medium (31) and the second high-temperature and high-pressure medium (32) passing through the Tesla high-temperature pressure reducing valve (1) are released into the self-cooling unit (2) through the outlet pipeline.

[0011] Preferably, the first low-temperature cooling medium (41) and the second low-temperature cooling medium (42) are respectively a first low-temperature sample water (41) and a second low-temperature sample water (42).

[0012] Preferably, the Tesla valve has a slit or a nozzle, and the size of the slit or the nozzle is adjusted based on the inlet pressure of the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) to achieve precise control of the fluid pressure.

[0013] Preferably, stop valves are installed on the front and rear sides of the self-cooling unit (2) to assist in equipment maintenance.

[0014] Preferably, an auxiliary heat exchanger (5) is provided on the outlet side of the self-cooling unit (2), and when the cooling temperature fails to meet the preset requirements, the auxiliary heat exchanger (5) is started to ensure that the outlet temperature of the high-temperature and high-pressure medium reaches the desired low temperature.

[0015] Preferably, a temperature sensor and a pressure sensor are provided on the outlet side of the self-cooling unit (2) for detecting the temperature and pressure of the first high-temperature and high-pressure medium (31) and the second high-temperature and high-pressure medium (32) in real time; the self-cooling unit (2) is connected to the PLC device, and the PLC device is used to control the operation of the temperature sensor and the pressure sensor.

[0016] Preferably, the plurality of low-temperature cooling water flow pipelines and the plurality of high-temperature medium flow pipelines are sealed and packaged by a sealing structure consisting of a heat exchanger tube bundle, an insulation layer and an outer shell structure arranged from the inside to the outside.

[0017] The second aspect of the present invention is to provide a working method of a self-decompression and self-temperature reduction sampling device, which is used for self-decompression and temperature reduction sampling of a dry coke quenching boiler, comprising:

[0018] Connect one side of the Tesla high-temperature pressure reducing valve (1) to the high-temperature and high-pressure sampling point of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler, and connect the other side of the Tesla high-temperature pressure reducing valve (1) to the outlet pipeline of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler;

[0019] releasing the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) in the high temperature and high pressure medium pipeline of the dry coke quenching boiler, so that the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) are depressurized by the reversely installed Tesla high temperature pressure reducing valve (1) to form a first high temperature medium and a second high temperature medium;

[0020] releasing the first high-temperature medium and the second high-temperature medium into a plurality of high-temperature medium flow pipelines in the self-cooling unit (2) through the outlet pipeline;

[0021] releasing a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42) in a refrigerant supply pipeline to a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines in a self-cooling unit (2), wherein the low-temperature cooling medium flow pipelines and the high-temperature medium flow pipelines are spirally wound around each other and physically separated;

[0022] The cooling unit (2) cools the first high-temperature medium and the second high-temperature medium by heat exchange through a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42). During the heat exchange and cooling process, the first high-temperature medium and the second high-temperature medium transfer heat to the first low-temperature cooling medium (41) and the second low-temperature cooling medium (42), so that the temperature of the first low-temperature cooling medium (41) and the second low-temperature cooling medium (42) increases, while the temperature of the first high-temperature medium and the second high-temperature medium gradually decreases until the temperature of the first high-temperature medium and the second high-temperature medium reaches thermal equilibrium;

[0023] The first balancing medium and the second balancing medium that have reached thermal equilibrium are released to the sampling pipeline of the dry coke quenching boiler, and are sampled by a manual / automatic sampling unit.

[0024] Beneficial effects of the device and working method of the present invention:

[0025] The self-decompressing Tesla valve is used to reduce the pressure of the high-temperature and high-pressure medium near the sampling point, and then the high-temperature medium is cooled by the low-temperature medium, reducing the risk of high-temperature and high-pressure operation and saving energy consumption of the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic structural diagram of a self-decompression and self-temperature reduction sampling device provided according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1-Tesla high temperature pressure reducing valve; 2-temperature reduction unit; 31-first high temperature and high pressure medium; 32-second high temperature and high pressure medium; 41-first low temperature cooling medium; 42-second low temperature cooling medium; 5-auxiliary heat exchanger. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0033] See also Figure 1This embodiment provides a self-decompression and self-temperature reduction sampling device, comprising:

[0034] A self-decompression unit, the self-decompression unit comprises a plurality of Tesla high-temperature pressure reducing valves 1 installed in reverse, the Tesla high-temperature pressure reducing valves 1 are installed in reverse on the side of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler; the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler flows with a first high-temperature and high-pressure medium 31 and a second high-temperature and high-pressure medium 32; the high-temperature medium inside the Tesla high-temperature pressure reducing valve 1 flows in the same direction;

[0035] The self-cooling unit 2 is a self-cooling heat exchange unit, comprising a refrigerant supply pipeline and a spiral cooling pipeline; a first low-temperature cooling medium 41 and a second low-temperature cooling medium 42 flow in the refrigerant supply pipeline, and the spiral cooling pipeline includes a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines, and the low-temperature cooling medium flow pipeline and the high-temperature medium flow pipeline are spirally wound and physically separated from each other;

[0036] The dry quenching boiler sampling pipeline is connected to the dry quenching boiler high-temperature and high-pressure medium pipeline through the self-cooling unit 2, the inlet of the dry quenching boiler sampling pipeline is connected to the outlet of the self-cooling unit 2, and the outlet of the dry quenching boiler sampling pipeline is connected to the manual / automatic sampling unit.

[0037] As a preferred embodiment, each high-temperature and high-pressure sampling point adopts a group of the Tesla high-temperature pressure reducing valves 1; or each high-temperature and high-pressure sampling point adopts one or more multi-stage series-connected Tesla high-temperature pressure reducing valves 1, so as to ensure the pressure reduction effect under different pressures to meet the medium pressure reduction requirements of dry quenching boilers with different energy efficiencies.

[0038] As a preferred embodiment, one side of the Tesla high-temperature pressure reducing valve 1 is connected to the high-temperature and high-pressure sampling point of the high-temperature and high-pressure medium pipeline of the dry quenching boiler, and the other side is connected to the outlet pipe of the high-temperature and high-pressure medium pipeline of the dry quenching boiler, and the first high-temperature and high-pressure medium 31 and the second high-temperature and high-pressure medium 32 passing through the Tesla high-temperature pressure reducing valve 1 are released into the self-cooling unit 2 through the outlet pipe. At this time, the fluid pressure of the first high-temperature and high-pressure medium 31 and the second high-temperature and high-pressure medium 32 has been reduced.

[0039] As a preferred embodiment, the first low-temperature cooling medium 41 and the second low-temperature cooling medium 42 are respectively the first low-temperature sample water 41 and the second low-temperature sample water 42 (i.e., in this embodiment, the cooling medium is usually cooling water, and of course it can also be other refrigerants, all within the scope of protection of the present invention); the temperature reduction unit 2 cools the high-temperature medium through the low-temperature sample water, the flow rate of the high-temperature medium after decompression is reduced, and the contact time with the low-temperature cooling water is increased, and the cooling effect is better than that of the conventional cooler. The high-temperature medium after decompression exchanges heat with the low-temperature sample water in the self-cooling heat exchange device and cools the high-temperature medium, and the high-temperature sample water flows on the hot water side, while the low-temperature sample water flows on the cold water side. During the heat exchange process, the high-temperature water body transfers heat to the low-temperature water body, so that the temperature of the low-temperature water body increases, while the temperature of the high-temperature water body gradually decreases until thermal equilibrium is reached. At the same time, the high-temperature medium and the low-temperature cooling water are both in their respective pipelines, reducing the risk of corrosion caused by heat exchange, and cooling water with relatively low water quality can be used for cooling, reducing cost consumption, and saving energy consumption of cooling medium.

[0040] As a preferred embodiment, the Tesla valve has a slit or a nozzle, and the size of the slit or the nozzle is adjusted based on the inlet pressure of the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 to achieve precise control of the fluid pressure.

[0041] In this embodiment, a self-decompressing Tesla high-temperature pressure reducing valve is used. When the Tesla high-temperature pressure reducing valve is installed in reverse, it diverts the high-temperature and high-pressure medium by means of internal gas disturbance. Each diverted medium flows back through the wing-shaped structure inside the valve body. The flow of the fluid through the slit or nozzle increases the kinetic energy of the fluid, hindering the flow of the high-temperature and high-pressure medium, thereby reducing the pressure of the high-temperature and high-pressure medium near the sampling point.

[0042] As a preferred embodiment, stop valves are installed at the front and rear sides of the self-cooling unit 2 to assist in equipment maintenance. When the entire device needs to be overhauled, the stop valves can be closed for maintenance.

[0043] As a preferred embodiment, an auxiliary heat exchanger 5 is provided at the outlet side of the self-cooling unit 2 to ensure the outlet temperature of the high-temperature and high-pressure medium. Specifically, if the cooling temperature cannot meet the preset requirements, the auxiliary heat exchanger 5 is started to cool the high-temperature medium to the required temperature.

[0044] As a preferred embodiment, a temperature sensor and a pressure sensor are provided at the outlet side of the self-cooling unit 2 for detecting the temperature and pressure of the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 in real time.

[0045] As a preferred embodiment, the self-cooling unit 2 is connected to the PLC device, and the PLC device is used to control the operation of the temperature sensor and the pressure sensor.

[0046] As a preferred embodiment, for multiple high-temperature and high-pressure media, the self-decompression unit and the self-temperature reduction unit 2 can be connected in parallel in the same set of self-decompression and self-temperature reduction sampling device to form an integrated self-decompression and self-temperature reduction sampling device suitable for multiple high-temperature and high-pressure media.

[0047] As a preferred embodiment, the plurality of low-temperature cooling water flow pipelines and the plurality of high-temperature medium flow pipelines are sealed and packaged by a sealing structure consisting of a heat exchanger tube bundle, an insulation layer and an outer shell structure arranged from inside to outside.

[0048] Working principle of the device:

[0049] After the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 of the high temperature and high pressure pipeline are rapidly decompressed by the Tesla high temperature pressure reducing valve 1, they enter the self-cooling heat exchange unit 2, and the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 are heat exchanged and cooled by the first low temperature cooling medium 41 and the second low temperature cooling medium 42. At this time, the first low temperature cooling medium 41 and the second low temperature cooling medium 42 are led out through the pipeline. Since when the first low temperature cooling medium 41 and the second low temperature cooling medium 42 are the first low temperature cooling water and the second low temperature cooling water respectively, only the temperature changes, and the water quality is not affected, so the high temperature medium can be directly led back for reuse after the temperature reduction treatment. After the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 are discharged from the self-cooling heat exchange device 2, if the cooling temperature cannot meet the preset requirements, the auxiliary heat exchange 5 is started to cool the medium to the required temperature and pressure, and manual / automatic sampling can be performed. Embodiment 2

[0050] This embodiment provides a working method of a self-decompression and self-temperature reduction sampling device, which is used for self-decompression and temperature reduction sampling of a dry coke quenching boiler, comprising:

[0051] Connect one side of the Tesla high-temperature pressure reducing valve 1 to the high-temperature and high-pressure sampling point of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler, and connect the other side of the Tesla high-temperature pressure reducing valve 1 to the outlet pipeline of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler;

[0052] The first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 in the high temperature and high pressure medium pipeline of the dry coke quenching boiler are released, so that the first high temperature and high pressure medium 31 and the second high temperature and high pressure medium 32 are decompressed by the reversely installed Tesla high temperature pressure reducing valve 1 to form the first high temperature medium and the second high temperature medium;

[0053] releasing the first high-temperature medium and the second high-temperature medium into a plurality of high-temperature medium flow pipelines in the self-cooling unit 2 through the outlet pipe;

[0054] The first low-temperature cooling medium 41 and the second low-temperature cooling medium 42 in the refrigerant supply pipeline are released to a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines in the self-cooling unit 2, wherein the low-temperature cooling medium flow pipelines and the high-temperature medium flow pipelines are spirally wound around each other and physically separated;

[0055] The cooling unit 2 cools the first high-temperature medium and the second high-temperature medium by heat exchange through the first low-temperature cooling medium 41 and the second low-temperature cooling medium 42. During the heat exchange and cooling process, the first high-temperature medium and the second high-temperature medium transfer heat to the first low-temperature cooling medium 41 and the second low-temperature cooling medium 42, so that the temperature of the first low-temperature cooling medium 41 and the second low-temperature cooling medium 42 increases, while the temperature of the first high-temperature medium and the second high-temperature medium gradually decreases until the first balanced medium and the second balanced medium reach thermal equilibrium;

[0056] The first balancing medium and the second balancing medium that have reached thermal equilibrium are released to the sampling pipeline of the dry coke quenching boiler, and are sampled by a manual / automatic sampling unit.

[0057] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by means of software plus necessary general hardware platforms. Based on such understanding, the technical solutions of the above embodiments can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-decompression and self-temperature reduction sampling device, characterized in that: include: A self-decompression unit, the self-decompression unit comprising a plurality of Tesla high-temperature pressure reducing valves (1) installed in opposite directions, the Tesla high-temperature pressure reducing valves (1) being installed in opposite directions on the side of a high-temperature and high-pressure medium pipeline of a dry coke quenching boiler; a first high-temperature and high-pressure medium (31) and a second high-temperature and high-pressure medium (32) flowing in the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler; and high-temperature media in the Tesla high-temperature pressure reducing valves (1) flowing in the same direction; A self-cooling unit (2), the self-cooling unit (2) being a self-cooling heat exchange unit, comprising a refrigerant supply pipeline and a spiral cooling pipeline; a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42) flow in the refrigerant supply pipeline, the interior of the spiral cooling pipeline comprising a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines, the low-temperature cooling medium flow pipeline and the high-temperature medium flow pipeline being spirally wound around each other and physically separated; a dry coke quenching boiler sampling pipeline, the dry coke quenching boiler sampling pipeline being connected to the dry coke quenching boiler high-temperature and high-pressure medium pipeline via the self-cooling unit (2), the inlet of the dry coke quenching boiler sampling pipeline being connected to the outlet of the self-cooling unit (2), and the outlet of the dry coke quenching boiler sampling pipeline being connected to the manual / automatic sampling unit; Each high-temperature and high-pressure sampling point uses a group of the Tesla high-temperature pressure reducing valves (1); or each high-temperature and high-pressure sampling point uses one or more multi-stage series-connected Tesla high-temperature pressure reducing valves (1), thereby ensuring the pressure reducing effect under different pressures to meet the medium pressure reducing requirements of dry coke quenching boilers with different energy efficiencies; One side of the Tesla high temperature pressure reducing valve (1) is connected to a high temperature and high pressure sampling point of a high temperature and high pressure medium pipeline of the dry coke quenching boiler, and the other side is connected to an outlet pipeline of a high temperature and high pressure medium pipeline of the dry coke quenching boiler, so that the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) passing through the Tesla high temperature pressure reducing valve (1) are released into the self-cooling unit (2) through the outlet pipeline.

2. The self-decompression and self-temperature reduction sampling device according to claim 1, characterized in that: The first low-temperature cooling medium (41) and the second low-temperature cooling medium (42) are respectively a first low-temperature sample water and a second low-temperature sample water.

3. The self-decompression and self-temperature reduction sampling device according to claim 2, characterized in that: The Tesla high-temperature pressure reducing valve (1) has a slit or a nozzle, and the size of the slit or the nozzle is adjusted based on the inlet pressure of the first high-temperature and high-pressure medium (31) and the second high-temperature and high-pressure medium (32) to achieve precise control of the fluid pressure.

4. The self-decompression and self-temperature reduction sampling device according to claim 3, characterized in that: Stop valves are installed on the front and rear sides of the self-cooling unit (2) to assist in equipment maintenance.

5. The self-decompression and self-temperature reduction sampling device according to claim 4, characterized in that: An auxiliary heat exchanger (5) is arranged on the outlet side of the self-cooling unit (2); when the cooling temperature fails to meet the preset requirement, the auxiliary heat exchanger (5) is started to ensure that the outlet temperature of the high-temperature and high-pressure medium reaches the desired low temperature.

6. The self-decompression and self-temperature reduction sampling device according to claim 5, characterized in that: A temperature sensor and a pressure sensor are arranged on the outlet side of the self-cooling unit (2) for detecting the temperature and pressure of the first high-temperature and high-pressure medium (31) and the second high-temperature and high-pressure medium (32) in real time; the self-cooling unit (2) is connected to a PLC device, and the PLC device is used to control the operation of the temperature sensor and the pressure sensor.

7. The self-decompression and self-temperature reduction sampling device according to claim 6, characterized in that: The plurality of low-temperature cooling medium flow pipelines and the plurality of high-temperature medium flow pipelines are sealed and packaged by a sealing structure composed of a heat exchanger tube bundle, a thermal insulation layer and an outer shell structure arranged from the inside to the outside.

8. A method for operating the self-decompression and self-temperature reduction sampling device according to any one of claims 1 to 7, which is used for self-decompression and temperature reduction sampling of a dry coke quenching boiler, characterized in that: include: Connect one side of the Tesla high-temperature pressure reducing valve (1) to the high-temperature and high-pressure sampling point of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler, and connect the other side of the Tesla high-temperature pressure reducing valve (1) to the outlet pipeline of the high-temperature and high-pressure medium pipeline of the dry coke quenching boiler; releasing the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) in the high temperature and high pressure medium pipeline of the dry coke quenching boiler, so that the first high temperature and high pressure medium (31) and the second high temperature and high pressure medium (32) are depressurized by the reversely installed Tesla high temperature pressure reducing valve (1) to form a first high temperature medium and a second high temperature medium; releasing the first high-temperature medium and the second high-temperature medium into a plurality of high-temperature medium flow pipelines in the self-cooling unit (2) through the outlet pipeline; releasing a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42) in a refrigerant supply pipeline to a plurality of low-temperature cooling medium flow pipelines and a plurality of high-temperature medium flow pipelines in a self-cooling unit (2), wherein the low-temperature cooling medium flow pipelines and the high-temperature medium flow pipelines are spirally wound around each other and physically separated; The self-cooling unit (2) cools the first high-temperature medium and the second high-temperature medium by heat exchange through a first low-temperature cooling medium (41) and a second low-temperature cooling medium (42). During the heat exchange and cooling process, the first high-temperature medium and the second high-temperature medium transfer heat to the first low-temperature cooling medium (41) and the second low-temperature cooling medium (42), so that the temperature of the first low-temperature cooling medium (41) and the second low-temperature cooling medium (42) increases, while the temperature of the first high-temperature medium and the second high-temperature medium gradually decreases, until a first equilibrium medium and a second equilibrium medium are formed after thermal equilibrium is reached; The first balancing medium and the second balancing medium that have reached thermal equilibrium are released to the sampling pipeline of the dry coke quenching boiler, and are sampled by a manual / automatic sampling unit.

Images