Cooling device for measuring material level of pulverized coal reactor

Abstract

The utility model belongs to the technical field of chemical equipment, and relates to a material level measuring and cooling device for a pulverized coal reactor, which comprises a pulverized coal reactor and a radar level meter arranged at the top of the pulverized coal reactor. The radar level meter is sleeved with a heat exchange sleeve, the heat exchange sleeve is fixed to the outer side of the top of the pulverized coal reactor, and the inlet section and the outlet section of a heat exchange medium communicate with a desalted water pipe network of the pulverized coal reactor correspondingly. According to the utility model, the radar level meter main body at the top of the pulverized coal reactor is cooled by adjusting measures to local conditions, fully combining production conditions of the pulverized coal reactor and utilizing desalted water resources in a pulverized coal reaction process, so that the temperatures of core components such as a radar transmitting antenna and electronic elements of the radar level meter are effectively reduced; it is guaranteed that the radar level meter accurately measures the ultra-high-temperature working condition level in the pulverized coal reactor, and continuous and stable operation of the pulverized coal reactor is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and particularly relates to a level measurement cooling device for a pulverized coal reactor. Background Technique

[0002] At present, a conventional radar level gauge adopts a microwave pulse measurement method and can operate normally within the industrial frequency band range. It has low beam energy and can be installed in various metal and non-metal containers or pipelines to perform non-contact continuous measurement of the level of liquids, slurries, and granular materials. Since the radar level gauge is harmless to the human body and the environment, and is also not affected by the specific gravity of the medium, the change of the dielectric constant, and does not require on-site calibration, etc., it is a better choice in industrial applications, especially for the reaction temperature monitoring of pulverized coal reactors.

[0003] In a pulverized coal reactor, pulverized coal is heated to about 600 °C and then enters the reactor, where the pulverized coal is pyrolyzed to generate raw gas, coal tar, and coke powder, and finally the raw gas, coal tar, and coke powder products are separated through separation. In the pyrolysis production process of pulverized coal, it is necessary to continuously detect the material level in the reactor. However, the temperature of the reactor is relatively high, and there are three media, solid, liquid, and gas, in the inner cavity of the reactor, and it is impossible to accurately measure through an ordinary level gauge during measurement.

[0004] When a radar level gauge is selected for application in ultra-high temperature and high-pressure working conditions such as pulverized coal reactors, since most radar level gauges are applicable to working conditions with a temperature within 200 °C, there will be problems such as too high measurement temperature, high-temperature intolerance of the radar transmitting antenna, electronic components, etc. in the measurement main body, resulting in inaccurate measurement or easy burnout.

[0005] The existing patent No. 202022481507.7 discloses a radar level gauge for high-temperature working conditions, which includes a radar level gauge main body, a short pipe fixed to the lower end face of the radar level gauge main body, and a mounting flange fixed to the lower end face of the short pipe. A horn antenna tube is fixed to the lower end face of the mounting flange. A condensing pipe is arranged in the horn antenna tube. The condensing pipe is in an S shape and is distributed around the horn antenna tube in a ring shape. One end of the condensing pipe penetrates the side wall of the horn antenna tube and is fixed with a water inlet pipe, and the end of the condensing pipe far from the water inlet pipe penetrates the side wall of the horn antenna tube and is fixed with a water outlet pipe. A filtering assembly for filtering medium impurities is arranged in the water inlet pipe. Heat-conducting fins are fixed in the horn antenna tube, and the heat-conducting fins are arranged in a spiral shape, which can protect the radar level gauge body for use under high-temperature working conditions.

[0006] For cooling technologies with similar technical ideas, they all consider cooling the radar level gauge itself. However, in ultra-high temperature working conditions such as pulverized coal reactors, when introducing cooling water pipes into the reactor interior, it is necessary to adaptively change the structure of the reactor itself. Moreover, since the cooling water pipes are introduced into the reactor, it will seriously affect the control of the reaction temperature inside the reactor and is limited in actual industrial applications. In addition, if cooling water pipes are introduced from the inner flange of the horn antenna tube, it can only cool the horn antenna tube, and the electronic components and other parts of the main body above the radar level gauge cannot be cooled, still unable to ensure the service life of the radar level gauge and still unable to ensure the continuous and stable operation of the pulverized coal reactor. Summary of the Invention

[0007] To solve the above problems, the present utility model provides a level measurement cooling device for a pulverized coal reactor that combines with the production environment of the pulverized coal reactor, makes full use of on-site cooling water resources, and can improve the overall cooling effect of the radar level gauge.

[0008] The technical solution adopted by the present utility model is: a level measurement cooling device for a pulverized coal reactor, including a pulverized coal reactor and a radar level gauge, the radar level gauge is arranged on the top of the pulverized coal reactor; a heat exchange sleeve is sleeved on the radar level gauge, the heat exchange sleeve is fixed on the outer side of the top of the pulverized coal reactor, and the inlet and outlet sections of the heat exchange medium are respectively communicated with the desalinated water pipe network of the pulverized coal reactor.

[0009] Further defined, the radar level gauge includes a measurement main body, a horn sensor, and a connection flange; the horn sensor is fixed on the top of the pulverized coal reactor through the connection flange and extends into the pulverized coal reactor; the measurement main body is arranged above the connection flange; the heat exchange sleeve is sleeved outside the measurement main body.

[0010] Further defined, the heat exchange sleeve includes a heat exchange cavity filled with a heat exchange medium, the heat exchange cavity is a double-layer jacket structure, fixed on the top of the pulverized coal reactor, and cooling water inlets and outlets are arranged on the outer wall of the outer heat exchange cavity, respectively communicated with the desalinated water pipe network.

[0011] Further defined, the heat exchange sleeve includes a heat exchange cavity, the part of the heat exchange cavity close to the measurement main body is made of a flexible material to form a flexible wall; the outside of the heat exchange cavity is made of a metal material to form a circular rigid support wall, and the rigid support wall and the flexible wall are connected inside and outside to form a flexible heat exchange sleeve structure, and cooling water inlets and outlets are arranged on the rigid support wall, respectively communicated with the desalinated water pipe network.

[0012] Further defined, the heat exchange sleeve further includes a heat conduction support ring arranged in the middle of the flexible wall, contacting the shell of the measurement main body, the heat conduction support ring is coaxially arranged with the rigid support wall and is connected and fixed to the rigid support wall through connecting strips distributed at intervals.

[0013] Further limitation: A plurality of the heat-conducting support rings are arranged side by side vertically.

[0014] Further limitation: The heat exchange sleeve is a water bath pool that is hermetically connected to the connecting flange. Cooling water inlets and outlets are provided on the side wall of the heat exchange sleeve and are respectively communicated with the desalinated water pipe network.

[0015] Further limitation: Heat-conducting fins or heat-conducting tubes that contact the measuring body are provided on the heat exchange sleeve.

[0016] Further limitation: A circulation pump is provided on the pipeline where the heat exchange sleeve is communicated with the desalinated water pipe network.

[0017] Further limitation: A control valve is also provided on the pipeline where the heat exchange sleeve is communicated with the desalinated water pipe network. Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1) The present utility model adapts to local conditions, fully combines the production conditions of the pulverized coal reactor, utilizes the desalinated water resources in the pulverized coal reaction process, cools the radar level gauge body at the top of the pulverized coal reactor, effectively reduces the temperature of the core components such as the radar transmitting antenna and electronic components of the radar level gauge, ensures accurate measurement of the level of the ultra-high temperature working conditions inside the pulverized coal reactor by the radar level gauge, and ensures the continuous and stable operation of the pulverized coal reactor.

[0019] 2) The present utility model wraps the radar level gauge with a heat exchange sleeve for all-round contact heat exchange, improving the heat exchange efficiency.

[0020] 3) The present utility model effectively exchanges heat and cools down by using the desalinated water in the production process of the pulverized coal reactor, heats the desalinated water while improving the heat exchange efficiency, realizes the resource utilization of heat, reduces energy consumption, and saves the process production cost.

[0021] 4) The heat exchange sleeve of the present utility model is arranged outside the pulverized coal reactor, effectively avoiding interference with the reaction temperature of the pulverized coal reactor itself and ensuring the continuous and stable operation of the pulverized coal reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of a level measurement cooling device for a pulverized coal reactor.

[0024] Figure 2 ForFigure 1 Schematic diagram of the connection structure between the radar level gauge and the heat exchange sleeve in

[0025] Figure 3 Schematic diagram of the installation of the heat conduction fins.

[0026] Figure 4 Schematic diagram of the structure of the heat exchange sleeve in Embodiment 3.

[0027] Figure 5 Schematic diagram of the structure of the heat exchange sleeve in Embodiment 4.

[0028] In the figure, 1 - pulverized coal reactor, 2 - radar level gauge, 21 - measurement main body, 22 - connecting flange, 23 - horn sensor, 3 - heat exchange sleeve, 31 - rigid support wall, 32 - flexible wall, 33 - heat conduction support ring, 34 - connecting strip, 35 - heat conduction pipe, 36 - heat conduction fins. Specific embodiments

[0029] The following combines the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0030] The following details the pulverized coal reactor 1 level measurement and cooling device provided by the present invention. The content not described in detail in the embodiments of the present invention belongs to the prior art well-known to those skilled in the art.

[0031] Embodiment 1

[0032] As Figure 1 、 Figure 2 and Figure 3 shown, the pulverized coal reactor 1 level measurement and cooling device of this embodiment is used to measure the level in the pulverized coal reactor 1 in real time to ensure the continuous and stable operation of the pulverized coal reactor 1. Its specific structure is:

[0033] At the top of the pulverized coal reactor 1, there are flange connection holes, and a radar level gauge 2 is installed on the flange connection holes. The radar level gauge 2 is a high-temperature type level gauge with a flared antenna, which is a commercially available product. According to its structural distribution, it includes a measurement main body 21, a horn sensor 23, and a connection flange 22. The measurement main body 21 is connected to the horn sensor 23 through the connection flange 22. The connection flange 22 is installed on the flange connection holes of the pulverized coal reactor 1, so that the horn sensor 23 extends into the cavity of the pulverized coal reactor 1, while the measurement main body 21 is outside the top of the pulverized coal reactor 1, ensuring that the radiation antenna, electronic components, processing module, display instrument, etc. of the measurement main body 21 are installed outside the top of the pulverized coal reactor 1 and encapsulated in a metal shell that is resistant to high temperature, acid and alkali, and pressure.

[0034] In order to enable the radar level gauge 2 to work stably under high-temperature conditions, a heat exchange sleeve 3 is sleeved outside the measurement main body 21. The heat exchange sleeve 3 mainly plays a cooling role and can contact with the radar level gauge 2 through the heat exchange medium filled inside, such as cooling water, coolant, or air cooling, to conduct heat exchange, thereby reducing the temperature of the radar level gauge 2 and enabling it to work stably in the high-temperature environment of pulverized coal pyrolysis.

[0035] In order to achieve local material utilization, energy conservation and consumption reduction, and resource treatment, the heat exchange sleeve 3 of this embodiment is connected to the desalinated water pipe network of the pulverized coal reactor 1, and the desalinated water in the pulverized coal pyrolysis process is used to exchange heat with the radar level gauge 2 to reduce the temperature of the radar level gauge 2. The heat exchange sleeve 3 is a water tank structure, which is hermetically connected to the connection flange 22, forming a water bath pool outside the shell of the measurement main body 21. A cooling water inlet and a cooling water outlet are opened on the outer side wall of the heat exchange sleeve 3, and the cooling water inlet and the cooling water outlet are arranged opposite to each other, and they are respectively connected to the desalinated water pipe network through pipelines. In order to ensure the circulation of desalinated water, a circulation pump, a switch valve, or a manual valve, etc. can be added to the pipeline.

[0036] Furthermore, in order to ensure the heat conduction efficiency, heat conduction fins 36 can be added inside the heat exchange sleeve 3, see Figure 3 , a plurality of heat conduction fins 36 are evenly distributed radially along the outside of the shell of the measurement main body 21, forming a fan-shaped heat exchange area outside the measurement main body 21. One end of the heat conduction fin 36 is in contact with the shell of the measurement main body 21, and the other end is fixed on the inner wall of the heat exchange sleeve 3, forming a plurality of heat conduction areas, and the contact area between the heat conduction fin 36 and the cooled desalinated water is increased, thereby improving the heat exchange efficiency.

[0037] The heat exchange sleeve 3 can be made of a metal material that is resistant to acid and alkali corrosion and pressure, such as stainless steel material, while the heat conduction fins 36 can be made of metal materials such as copper and aluminum that are corrosion-resistant and have fast heat conduction. The installation quantity of the heat conduction fins 36 can be 2 - 6, preferably 4, and can be adjusted according to the specific working conditions, as long as it can ensure heat transfer and the flow of cooled desalinated water.

[0038] Furthermore, the above heat-conducting fins 36 can also be replaced by a heat-conducting pipe 35. The heat-conducting pipe 35 vertically surrounds the outside of the measuring body 21, and transfers heat in contact with the housing of the measuring body 21, or can also be wound around the outer housing of the measuring body 21. Its main purpose is to increase the heat exchange efficiency of the water bath cooling. The layout method of the heat-conducting pipe 35 is adjusted according to the actual working conditions.

[0039] During use, the horn sensor 23 of the radar level gauge 2 detects the level information and transmits the detection signal to the control platform through wireless or wired signals. During the real-time operation of the radar level gauge 2, the circulating pump is used to inject the cooling desalted water in the pulverized coal pyrolysis process into the heat exchange sleeve 3, and circulate for heat exchange, so that the cooling desalted water quickly exchanges heat with the housing of the measuring body 21 of the radar level gauge 2, reducing the temperature of the measuring body 21 and ensuring that it can stably measure under high-temperature working conditions, ensuring the stable operation of the pulverized coal reactor 1.

[0040] Embodiment 2

[0041] As Figure 1 shown, the difference between this embodiment and Embodiment 1 is that the heat exchange sleeve 3 of this embodiment includes a heat exchange cavity filled with a heat exchange medium. The heat exchange cavity is a double-layer jacket structure, which is hermetically fixed at the top of the pulverized coal reactor 1 by welding. Cooling water inlets and outlets are provided on the wall of the outer heat exchange cavity, which are respectively communicated with the desalinated water pipe network.

[0042] Other components and their connection methods are the same as those in Embodiment 1.

[0043] Embodiment 3

[0044] As Figure 4 shown, the difference between this embodiment and Embodiment 1 is that the heat exchange sleeve 3 of this embodiment includes a heat exchange cavity. The part of the heat exchange cavity close to the measuring body 21 is made of a flexible material such as high-temperature resistant rubber or waterproof fiber to form a flexible wall 32; the outside of the heat exchange cavity is a circular rigid support wall 31 made of stainless steel or other metal materials that are corrosion-resistant, pressure-resistant and high-temperature resistant. The rigid support wall 31 and the flexible wall 32 are vulcanized and connected inside and outside by a vulcanization process to form the structure of the flexible heat exchange sleeve 3, ensuring the external rigidity of the heat exchange cavity and forming a supporting effect on the overall structure of the heat exchange sleeve 3. At the same time, cooling water inlets and outlets are provided on the rigid support wall 31, which are respectively communicated with the desalinated water pipe network to form a cooling desalted water circulation path; and the inner wall in contact with the measuring body 21 can be adaptively changed and adjusted according to the structural change of the measuring body 21 to ensure full contact between the flexible wall 32 and the measuring body 21 and ensure the heat exchange effect.

[0045] For the material selection of the flexible wall 32, the material selection of the rigid support wall 31, and the connection method between the flexible wall 32 and the rigid support wall 31, they can be selected according to the actual working conditions. The main thing is that it can ensure external rigid support and internal flexible adjustment, and any implementation method that can ensure the realization of the heat exchange efficiency with the measurement main body 21 is acceptable.

[0046] The other components and their connection methods are the same as those in Embodiment 1.

[0047] Embodiment 4

[0048] As Figure 5 shown, on the basis of Embodiment 3, in order to further enhance the support of the flexible wall 32 of the heat exchange sleeve 3, heat conduction support rings 33 are respectively arranged in the middle of the flexible wall 32 or in the upper, middle, and lower parts of the flexible wall 32. The heat conduction support rings 33 are coaxially arranged with the rigid support wall 31 and are fixedly welded to the rigid support wall 31 through a plurality of connecting bars 34 made of stainless steel and distributed at intervals. The heat conduction support rings 33 can be in contact with the shell of the measurement main body 21. On the one hand, it directly transfers heat and improves the heat exchange efficiency. On the other hand, it can play a role of skeleton support for the flexible wall 32.

[0049] The other components and their connection methods are the same as those in Embodiment 1.

[0050] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pulverized coal reactor level measurement and cooling device, comprising a pulverized coal reactor and a radar level meter, characterized in that: The radar level meter is arranged on the top of the pulverized coal reactor; a heat exchange jacket is sleeved on the radar level meter, the heat exchange jacket is fixed on the top outside of the pulverized coal reactor and the inlet and outlet sections of the heat exchange medium are respectively connected to the desalted water pipe network of the pulverized coal reactor.

2. The pulverized coal reactor level measurement and cooling device according to claim 1, characterized in that: The radar level meter includes a measuring body, a horn sensor and a connecting flange; the horn sensor is fixed to the top of the pulverized coal reactor through the connecting flange and extends into the pulverized coal reactor; the measuring body is arranged above the connecting flange; the heat exchange sleeve is arranged outside the measuring body.

3. The pulverized coal reactor level measurement and cooling device according to claim 2, characterized in that: The heat exchange jacket comprises a heat exchange cavity filled with heat exchange medium. The heat exchange cavity is a double-layer jacket structure fixed on the top of the pulverized coal reactor. A cooling water inlet and outlet are opened on the outer heat exchange cavity wall, which are respectively connected to the desalted water pipeline network.

4. The pulverized coal reactor level measurement and cooling device according to claim 2, characterized in that: The heat exchange jacket comprises a heat exchange cavity, the part of the heat exchange cavity close to the measuring body is made of a flexible wall made of a flexible material; the outside of the heat exchange cavity is made of a circular ring-shaped rigid support wall made of a metal material, the rigid support wall and the flexible wall are connected inside and outside to form a flexible heat exchange jacket structure, and a cooling water inlet and outlet are opened on the rigid support wall, which are respectively connected to the desalted water pipeline network.

5. The pulverized coal reactor level measurement and cooling device according to claim 4, characterized in that: The heat exchange sleeve also includes a heat conductive support ring, which is arranged in the middle of the flexible wall and contacts the shell of the measuring body. The heat conductive support ring is coaxially arranged with the rigid support wall and is connected and fixed to the rigid support wall through spaced connecting strips.

6. The pulverized coal reactor level measurement and cooling device according to claim 5, characterized in that: The heat-conducting support rings are multiple and arranged in parallel up and down.

7. The pulverized coal reactor level measurement and cooling device according to claim 2, characterized in that: The heat exchange jacket is a water bath which is sealed with the connecting flange. The side wall of the heat exchange jacket is provided with cooling water inlet and outlet which are respectively connected with the desalted water pipe network.

8. The pulverized coal reactor level measurement and cooling device according to claim 7, characterized in that: The heat exchange sleeve is provided with heat conducting fins or heat conducting pipes in contact with the measurement body.

9. The pulverized coal reactor level measurement and cooling device according to any one of claims 1 to 8, characterized in that: A circulation pump is arranged on the pipeline connecting the heat exchange jacket and the desalted water pipeline network.

10. The pulverized coal reactor level measurement and cooling device according to claim 9, characterized in that: A control valve is also provided on the pipeline connecting the heat exchange jacket and the desalted water pipeline network.

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