A kind of coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device

Abstract

The application discloses a kind of coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device, when pipeline leaks, supercritical water in pipeline and gas product from high temperature and high pressure environment in pipe enter to normal pressure environment outside pipe, from supercritical state into superheated steam state, volume rapidly expands, produce water vapor flow, push semicylindrical blade to move back, at this time, the circuit consisting of semicylindrical blade, spring, electrode contact, alarm component and power supply is connected, and alarm component alarms.Alarm at the same time, high-temperature water vapor and gas product leaked by shell are introduced to condenser from connecting pipe to realize gas-liquid separation, and gas product can be further collected or emptied subsequently.The application has simple structure, convenient disassembly and assembly, can issue alarm when pipeline leaks, has a good reminding effect on normal operation of system and safety of operating personnel, and avoids the risk that operating personnel is injured by directly injected high-temperature gas.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of supercritical water gasification of coal, and particularly relates to a pipeline leakage alarm protection device for a coal supercritical water gasification hydrogen production system. BACKGROUND

[0002] At present, the main utilization mode of coal is direct combustion to provide heat, however, the massive combustion of coal is the main pollution source of SO2 and smoke dust, and causes a series of environmental problems such as acid rain, haze and the like. Therefore, it is of great significance for the development of the energy field of China to research and develop advanced clean and efficient coal conversion technologies.

[0003] Supercritical water refers to special state water with temperature and pressure higher than the critical point (T = 374.15 DEG C, P = 22.12 MPa). Compared with normal temperature and pressure water, supercritical water has significantly reduced polarity, weakened hydrogen bond effect, increased diffusion coefficient, reduced solubility of inorganic salts, and can dissolve organic substances such as oil. Supercritical water gasification technology is a new type of gasification technology developed in recent years, and has the advantages of high gasification rate, high hydrogen content in gas products, and fast reaction rate when coal is treated by using this technology.

[0004] However, supercritical water has certain corrosion, especially when containing certain inorganic ions, the corrosion will be stronger. Under supercritical water conditions, common corrosion types of materials include stress corrosion cracking, intergranular corrosion, and pitting corrosion. In addition, the product after supercritical water gasification of coal contains a large amount of hydrogen, and under high temperature and high pressure conditions, metal materials will have hydrogen embrittlement phenomenon under the action of hydrogen. Therefore, in the coal supercritical water gasification hydrogen production system, especially at the welding position of the pipeline, there is a risk of pipeline leakage due to corrosion and hydrogen embrittlement. Once the pipeline leakage is not discovered in time, it may pose a threat to the safety of the workers.

[0005] In addition, most of the existing pipeline leakage monitoring devices monitor pipeline leakage by means of dynamic change of pipeline pressure signal or detection of specific gas components. Such devices usually need to modify the original pipeline to meet the installation requirements of the devices, are expensive, and cannot provide further protection for the safety of the on-site workers in time when the pipeline leaks. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a pipeline leakage alarm protection device for a coal supercritical water gasification hydrogen production system to solve the technical problems of immediate early warning of pipeline leakage accidents and diversion of high-temperature gas in the supercritical water gasification hydrogen production system, and effectively monitor the pipeline leakage of the coal supercritical water gasification hydrogen production system.

[0007] The technical scheme adopted by the present application is as follows:

[0008] The utility model provides a kind of coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device, including shell, shell is hollow semicylindrical structure, including two, two shell are composed of cylindrical structure in upper and lower and are sleeved on pipeline, the inside of each shell is provided with semicylindrical structure blade, two blades are symmetrically arranged on the outside of pipeline, spring and electrode contact are provided between each blade and corresponding shell, spring and electrode contact are electrically connected with alarm circuit arranged on the outside of shell.

[0009] Specifically, one end of the spring is fixed inside the shell and connected with the external circuit, and the other end is connected with the blade, and the radius of the blade is greater than the radius of the pipeline.

[0010] Specifically, two electrode contacts are provided on the shell behind each blade, and the two electrode contacts are correspondingly arranged on the two sides of the spring.

[0011] Specifically, a gas outlet is formed on the shell, and the gas outlet is connected to the condenser through a connecting pipe.

[0012] Further, the condenser is provided with a liquid discharge pipe at the bottom and a gas discharge pipe at the top.

[0013] Specifically, semicircular grooves are formed at the centers of the inner sides of the front end and the rear end of the shell.

[0014] Specifically, the radius of the groove is equal to the radius of the pipeline.

[0015] Specifically, the blade includes a plurality of blades arranged side by side in the axial direction of the pipeline.

[0016] Specifically, the alarm circuit includes an alarm component and a power supply, the positive electrode of the power supply is electrically connected with the electrode contact, and the negative electrode is electrically connected in sequence through the alarm component, the spring and the blade.

[0017] Specifically, the two shells are connected in a detachable manner.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] A coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device, the alarm part connected by the blade, the spring, the electrode contact, the power supply and the alarm circuit can provide immediate alarm when the pipeline leaks, providing effective monitoring for the safety of the pipeline.

[0020] Further, the bottom of the condenser is provided with a liquid discharge pipe, and the top is provided with a gas discharge pipe, after the pipe leaks, the high-temperature water vapor is condensed into liquid water in the condenser, and is discharged and recovered through the liquid discharge pipe, and the gas product is discharged to a safe area or further collected through the gas discharge pipe.

[0021] Further, the center of the front end and the rear end of the shell is provided with a semicircular structure groove for the pipeline to pass through.

[0022] Further, the radius of the shell groove is equal to the radius of the pipeline, so that the shell can clamp the pipeline during installation of the device, and the fixation of the device is realized.

[0023] Further, the shell inner blade includes a plurality of blades arranged in parallel along the pipeline axis, which can effectively extend the monitoring length of the device to the pipeline.

[0024] Further, the two shells are connected in a detachable manner, which facilitates the installation, removal and pipeline maintenance of the device.

[0025] In summary, the present application has the advantages of simple structure, easy implementation and low cost, which can alarm the pipeline leakage of the coal supercritical water gasification hydrogen production system in time, and guide the leaked high-temperature water vapor and gas product to the condenser, thereby ensuring the safety of the on-site operators.

[0026] The technical solutions of the present application will be further described in detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure of the present application is shown in the figure;

[0028] Figure 2 The present application is a perspective view.

[0029] Wherein: 1. shell; 101. gas outlet; 102. groove; 2. spring; 3. electrode contact; 4. blade; 5. bolt; 6. nut; 7. alarm component; 8. power supply; 9. connecting pipe; 10. condenser; 11. liquid discharge pipe; 12. gas discharge pipe; 13. pipeline. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one edge" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0032] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside 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.

[0033] It should be understood that when used in the present specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0034] It should also be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0035] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0036] In the drawings, various structural schematic diagrams according to the disclosed embodiments of the present application are shown. These drawings are not drawn to scale, in which certain details are exaggerated for the purpose of clear expression, and certain details can be omitted. The shapes of various regions, layers and their relative size and positional relationship shown in the drawings are only exemplary, and in actuality there can be deviations due to manufacturing tolerances or technical limitations, and a person skilled in the art can additionally design regions / layers with different shapes, sizes and relative positions according to actual needs.

[0037] The application provides a pipeline leakage alarm protection device for a coal supercritical water gasification hydrogen production system.

[0038] Please refer to Figure 1 and Figure 2 The application provides a pipeline leakage alarm protection device for a coal supercritical water gasification hydrogen production system.

[0039] The shell 1 comprises two hollow semicylindrical structures, the two shells 1 are sleeved on the pipeline 13 and are fixed by the bolts 5, the wall surface of the shell 1 extends out a base at both ends for connecting the bolts 5 and the nuts 6, one of the shells 1 is connected with the condenser 10 through the connecting pipe 9, the condenser 10 is provided with the liquid discharge pipe 11 and the gas discharge pipe 12, the spring 2 and the electrode contact 3 are arranged in the shell 1, and the spring 2 and the electrode contact 3 are electrically connected with the alarm circuit arranged outside the shell 1.

[0040] The inner side of the shell 1 is provided with the semicylindrical blade 4, the two semicylindrical blades 4 surround the pipeline 13, and the radius of the blade 4 is slightly larger than the radius of the pipeline 13.

[0041] The inner side of the shell 1 is provided with the semicylindrical blade 4, the two semicylindrical blades 4 surround the pipeline 13, and the radius of the blade 4 is slightly larger than the radius of the pipeline 13.

[0042] The inner side of the shell 1 is provided with the semicylindrical blade 4, the two semicylindrical blades 4 surround the pipeline 13, and the radius of the blade 4 is slightly larger than the radius of the pipeline 13.

[0043] Please refer to Figure 2The side wall surface of the upper side shell 1 is provided with an air outlet hole 101 for internal gas outflow, the air outlet hole 101 is connected with a condenser 10 through a connecting pipe 9, the connecting pipe 9 is connected with the shell 1 and the condenser 10 through screw threads, so that the connecting pipe 9 can be conveniently disassembled and assembled, the bottom of the condenser 10 is provided with a liquid discharge pipe 11, and the top of the condenser 10 is provided with a gas discharge pipe 12, the outlet of the gas discharge pipe 12 is connected with corresponding gas collecting devices or a safe gas emptying area, and is used for collecting gas products or discharging the gas products to a safe environment.

[0044] The connecting pipe 9 is a metal hose or a metal pipe.

[0045] The spring 2 is arranged between the blade 4 and the shell 1, one end of the spring 2 is fixed in the shell 1 and connected with external lines, and the other end of the spring 2 is connected with the semi-cylindrical blade 4.

[0046] When the pipeline leaks, the supercritical water and the gas product in the pipeline 13 enter the normal pressure environment outside the pipeline from the high temperature and high pressure environment in the pipeline, change from the supercritical state to the superheated steam state, and rapidly expand in volume to generate water vapor flow, so as to drive the blade 4 to move backward, at this time, the circuit composed of the blade 4, the spring 2, the electrode contact 3, the alarm component 7 and the power supply 8 is connected, and the alarm component 7 alarms; at the same time of the alarm, the leaked high temperature water vapor and the gas product are guided from the connecting pipe 9 to the condenser 10 through the air outlet hole 101 to realize gas-liquid separation, and the gas product is further collected or emptied through the liquid discharge pipe 11 and the gas discharge pipe 12.

[0047] According to the length of the pipeline 13 to be monitored, the number of the blades 4 is appropriately selected, for example, when the pipeline to be monitored is long, a plurality of blades 4 can be arranged in parallel along the axial direction to lengthen the monitoring length of the alarm device.

[0048] The electrode contact 3 includes two electrode contacts which are arranged at intervals on the inner wall surface of the shell 1.

[0049] The alarm line includes the alarm component 7 and the power supply 8, the positive electrode of the power supply 8 is electrically connected with the electrode contact 3 in the shell 1, the negative electrode is sequentially electrically connected with the alarm component 7, the spring 2 and the blade 4; when the blade 4 contacts the electrode contact 3, the circuit composed of the blade 4, the spring 2, the electrode contact 3, the alarm component 7 and the power supply 8 is connected, and the alarm component 7 alarms.

[0050] The alarm component 7 alarms by displaying components or sounds alarm by using sound components, in addition, as a preferred solution, the alarm device 7 is electrified at the same time to trigger the corresponding switch to cut off the power supply switch of the supercritical water system.

[0051] The working process of the pipeline leakage alarm protection device for the coal supercritical water gasification hydrogen production system is as follows:

[0052] The connection of the fastening bolt 5 and the nut 6 makes the recess 102 of the front end and the rear end of the shell 1 clamped to the pipeline, so as to fix the alarm device at the position of the pipeline to be monitored;

[0053] When the pipeline 13 containing supercritical water leaks, the supercritical water in the pipeline 13 changes from a supercritical state to a superheated steam state, and the volume expands rapidly, forming a gas flow, which pushes the blade 4 to move backward, so that the blade 4 contacts the electrode contact 3, at this time, the circuit composed of the blade 4, the spring 2, the electrode contact 3, the alarm component 8 and the power supply 7 is connected, and the alarm component 8 alarms;

[0054] At the same time of the alarm, the water vapor and gas products leaked from the pipeline 13 flow from the connecting pipe 9 to the condenser 10 through the shell 1, in the condenser 10, the water vapor condenses into water and flows out from the liquid discharge pipe 11, and the gas products flow out from the gas discharge pipe 12, which are collected or directly discharged to a safe environment;

[0055] Since the high-temperature steam leaked from the pipeline is introduced into the condenser, the risk of the operating personnel being injured by the directly sprayed high-temperature gas is avoided, and the safety of the operating personnel is further ensured.

[0056] In summary, the pipeline leakage alarm protection device for the coal supercritical water gasification hydrogen production system has the advantages of simple structure, convenient disassembly and assembly, can alarm when the pipeline leaks, has a good reminding effect on the normal operation of the system and the safety of the operating personnel, and avoids the risk of the operating personnel being injured by the directly sprayed high-temperature gas.

[0057] The above content only illustrates the technical idea of the present application, and cannot limit the protection scope of the present application, and any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the claims of the present application.

Claims

1. A coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device, characterized in that, The utility model provides a kind of supercritical water pipeline leakage alarm device, including shell (1), shell (1) is hollow semi-cylindrical structure, including two, two shell (1) form cylindrical structure set on pipeline (13) in upper and lower, shell (1) is opened with gas outlet (101), gas outlet (101) is connected condenser (10) by connecting pipe (9), condenser (10) bottom is equipped with liquid discharge pipe (11), top is equipped with gas discharge pipe (12), the inside of each shell (1) is provided with semi-cylindrical structure blade (4), two blades (4) are symmetrically arranged on the outside of pipeline (13), spring (2) and electrode contact (3) are arranged between each blade (4) and corresponding shell (1), one end of spring (2) is fixed in shell (1) and is connected with external circuit, the other end is connected with blade (4), the radius of blade (4) is greater than the radius of pipeline (13), two electrode contacts (3) are provided on the shell (1) after each blade (4), two electrode contacts (3) are correspondingly arranged on the two sides of spring (2), spring (2) and electrode contact (3) are electrically connected with alarm circuit arranged on the outside of shell (1), the center of the inside of the front end and the rear end of shell (1) is respectively provided with semicircular structure recess (102), the radius of recess (102) is equal to the radius of pipeline (13), alarm circuit includes alarm component (7) and power supply (8), the positive electrode of power supply (8) is electrically connected with electrode contact (3), and the negative electrode is sequentially electrically connected with alarm component (7), spring (2) and blade (4);When the pipeline (13) with supercritical water leaks, the supercritical water in the pipeline (13) changes from supercritical state to superheated steam state rapidly, and the volume expands to form airflow, the airflow drives blade (4) to move backward, so that blade (4) contacts with electrode contact (3), at this time, the circuit composed of blade (4), spring (2), electrode contact (3), alarm component (7) and power supply (8) is connected, and alarm component (7) alarms; At the same time of alarm, the water vapor and gas product leaked from the pipeline (13) flow from connecting pipe (9) to condenser (10) through shell (1), in condenser (10), water vapor condenses into water and flows out from liquid discharge pipe (11), and gas product flows out from gas discharge pipe (12) and is collected or directly discharged to a safe environment.

2. The coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device according to claim 1, characterized in that, Blade (4) includes a plurality of, and is arranged side by side along the axial direction of pipeline (13).

3. The coal supercritical water gasification hydrogen production system pipeline leakage alarm protection device according to claim 1, characterized in that, Two shell (1) are connected in a detachable manner.

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