An improved duct for enclosure ventilation

Abstract

The application provides a pipeline improvement structure for casing ventilation, relates to the technical field of casing ventilation, and solves the problem of explosion and poisoning risk of a synthetic gas casing in winter due to the fact that a fan cannot operate for 24 hours. The pipeline improvement structure comprises a first pipeline and a second pipeline, the first pipeline is connected with a synthetic gas casing and a first fan for positive pressure air blowing into the synthetic gas casing, the second pipeline is connected with a gas turbine casing and a second fan for negative pressure air suction from the gas turbine casing, a connecting pipe is connected between the first pipeline and the second pipeline, one end of the connecting pipe is located on a side of the first fan away from the synthetic gas casing, the other end of the connecting pipe is located between the gas turbine casing and the second fan, and baffle assemblies are arranged on the first pipeline and the second pipeline. The pipeline for heat dissipation of the existing gas turbine is connected with an air conveying pipeline of the synthetic gas casing, heat at the gas turbine casing is conveyed into the synthetic gas casing in winter, normal operation of instruments is ensured, and the fan can operate uninterruptedly.

Description

Technical Field

[0001] This invention relates to the field of enclosure ventilation technology, and more specifically, to an improved duct structure for enclosure ventilation. Background Technology

[0002] In power plants that generate electricity from coal mines, pipelines are installed to transport syngas (carbon monoxide and hydrogen) produced by coal gasification. The outside of the syngas pipeline is covered with a casing. This casing prevents the syngas from spreading in the event of a leak. In addition, air needs to be continuously supplied into the casing to dilute and expel the syngas inside, so as to prevent the syngas concentration from becoming too high and causing an explosion or poisoning.

[0003] During winter operation, the high flow rate of the syngas casing fan and the low ambient temperature result in extremely low temperatures in the syngas casing, which can easily lead to instrument damage and inaccuracies, causing the unit to trip. Therefore, the existing solution uses an intermittent fan operation method. However, if a syngas leak occurs and the fan is not running, a large amount of syngas will accumulate in the syngas casing in a short period of time, which can easily lead to explosions and poisoning incidents. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide an improved duct structure for gas turbine housing ventilation. This structure connects the existing duct used for gas turbine heat dissipation with the air delivery duct of the syngas housing. In winter, heat from the gas turbine housing is transferred to the syngas housing to ensure the normal operation of instruments and the uninterrupted operation of the fan. Simultaneously, in spring, autumn, and winter, when the ambient temperature is low, the original fan used for transporting heat from the gas turbine housing can be shut down. Both housings share a single fan, reducing electricity consumption.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] An improved duct structure for ventilated housings includes a first duct and a second duct. The first duct is connected to a syngas housing and a first fan that blows positive pressure air into the syngas housing. The second duct is connected to a gas turbine housing and a second fan that draws air from the gas turbine housing under negative pressure. A connecting pipe connects the first duct and the second duct. One end of the connecting pipe is located on the side of the first fan away from the syngas housing, and the other end of the connecting pipe is located between the gas turbine housing and the second fan. Both the first duct and the second duct are equipped with baffle assemblies for opening and closing the ducts. The baffle assembly on the first duct is located on the side of the connecting pipe away from the first fan, and the baffle assembly on the second duct is located between the connecting pipe and the second fan.

[0007] Preferably, the connecting pipe is also provided with a baffle assembly.

[0008] Preferably, the baffle assembly includes a housing fixedly sleeved on two spaced pipes, a baffle slidably connected to the housing is disposed inside the housing, one side of the baffle is abutting the end face of one of the pipes, and the baffle is connected to a driving device for driving the baffle to move radially along the pipe.

[0009] Preferably, the driving device includes a motor, the motor is connected to a lead screw, and the lead screw is threaded into a baffle.

[0010] Preferably, a filter assembly is provided inside the housing, the filter assembly is fitted to the end face of another pipe, the filter assembly includes a support frame, and the filter is installed in the support frame.

[0011] Preferably, the two sides of the support frame are slidably connected to the outer shell, and the upper end of the support frame is movably sealed through the outer shell.

[0012] Preferably, a sleeve is provided between the baffle and the filter assembly, a connecting rod connected to the outer shell is movably passed through the middle of the sleeve, and movable rods are movably provided inside both ends of the sleeve. One movable rod of the sleeve is hinged to the baffle, and the other movable rod of the sleeve is hinged to the filter assembly. The outer shell is provided with bristles located on one side of the filter assembly.

[0013] Preferably, the housing is provided with a fan located on the side of the filter assembly away from the bristles.

[0014] Preferably, the bottom of the outer casing is provided with a funnel-shaped collection trough, and a sealing head is detachably connected to the lowest point of the collection trough.

[0015] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0016] Connect the existing pipes used for gas turbine heat dissipation to the air supply pipes of the syngas casing. In winter, the heat from the gas turbine casing will be transferred to the syngas casing to ensure the normal operation of the instruments and the uninterrupted operation of the fan. At the same time, in spring, autumn and winter, when the ambient temperature is not high, the original fan used to transfer heat from the gas turbine casing can be turned off. The two casings share a single fan, reducing the use of electricity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the pipeline modification structure provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the front cross-sectional structure of the baffle assembly provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of another state of the baffle assembly provided in an embodiment of the present invention;

[0021] Figure 4 This is a top view cross-sectional structural diagram of the baffle assembly provided in an embodiment of the present invention.

[0022] Icons: 1-First pipe; 2-First fan; 3-Synthetic gas casing; 4-Connecting pipe; 5-Second pipe; 6-Gas turbine casing; 7-Second fan; 8-Baffle assembly; 81-Outer casing; 82-Motor; 83-Screw; 84-Baffle; 85-Collection tank; 86-Sealing head; 87-Sleeve; 88-Moving rod; 89-Bearing frame; 810-Filter screen; 811-Brush bristles; 812-Fan; 813-Connecting rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] The following is combined with Figures 1-4 The present invention will be described in detail below.

[0026] Example

[0027] An improved duct structure for ventilated housings includes a first duct 1 and a second duct 5. The first duct 1 is connected to a syngas housing 3 and a first fan 2 that blows positive pressure into the syngas housing 3. The second duct 5 is connected to a gas turbine housing 6 and a second fan 7 that draws in negative pressure from the gas turbine housing 6. A connecting pipe 4 connects the first duct 1 and the second duct 5. One end of the connecting pipe 4 is located on the side of the first fan 2 away from the syngas housing 3, and the other end of the connecting pipe 4 is located between the gas turbine housing 6 and the second fan 7. Both the first duct 1 and the second duct 5 are provided with baffle assemblies 8 for opening and closing the ducts. The baffle assembly 8 on the first duct 1 is located on the side of the connecting pipe 4 away from the first fan 2, and the baffle assembly 8 on the second duct 5 is located between the connecting pipe 4 and the second fan 7.

[0028] The first pipe 1 is used to supply air into the syngas casing 3, generally using a positive pressure supply method with fast ventilation to ensure the dilution and discharge of syngas within the casing 3. The second pipe 5 is used to draw away hot air from the gas turbine casing 6 under negative pressure to maintain the temperature inside the casing 6 at a suitable level and prevent temperature accumulation that could cause a fire. The connecting pipe 4 connects the first pipe 1 and the second pipe 5. During use, the baffle assemblies 8 on both the first pipe 1 and the second pipe 5 are closed to ensure that the first fan 2 can draw in hot air from the gas turbine casing 6.

[0029] A baffle assembly 8 is also installed on the connecting pipe 4. When a fire occurs inside the syngas casing 3 or the gas turbine casing 6, the baffle assembly 8 on the connecting pipe 4 and the corresponding fan are closed, and the baffle assembly 8 of the pipe containing the unburned casing is opened to ensure the normal operation of the unburned casing. Carbon dioxide needs to be injected into the burning casing to assist in fire extinguishing. In summer, when the ambient temperature is high, all baffle assemblies 8 need to be opened, and all fans need to be turned on simultaneously. The suction force of the first fan 2 is used to draw in hot air from the gas turbine casing 6, improving the efficiency of hot air delivery.

[0030] The baffle assembly 8 includes a housing 81 fixedly sleeved on two spaced pipes. A baffle 84, slidably connected to the housing 81, is disposed within the housing 81. One side of the baffle 84 is abutted against the end face of one of the pipes. The baffle 84 is connected to a driving device for driving the baffle 84 to move radially along the pipe. The driving device includes a motor 82, which is connected to a lead screw 83, threaded into the baffle 84. The baffle 84, abutting against the pipe end face, is moved by the motor 82 and the lead screw 83, thereby opening and closing the pipes. The motor 82 and lead screw 83 can be replaced with an electric / hydraulic telescopic rod for driving.

[0031] A filter assembly is installed inside the outer casing 81. The filter assembly is attached to the end face of another pipe. The filter assembly includes a support frame 89, in which a filter 810 is installed. The filter assembly filters dust in the pipe, preventing dust from accumulating on the fan blades, making the blade surface rough, causing vibration, and resulting in a decrease in fan speed and airflow. The filter assembly located at the connecting pipe 4 and the second pipe 5 mainly filters dust inside the gas turbine casing 6, while the filter assembly located in the first pipe 1 mainly filters dust in the air.

[0032] The two sides of the support frame 89 are slidably connected to the outer shell 81, and the upper end of the support frame 89 is movably sealed through the outer shell 81. To facilitate the removal of the filter assembly for cleaning, an opening is made in the outer shell 81, allowing for easy removal of the filter assembly. The upper end of the support frame 89 is in sealed contact with the opening. After the filter assembly is moved into the pipe, the opening is closed to reduce air leakage or the entry of debris into the pipe. The slidable connection between the support frame 89 and the outer shell 81 ensures that the filter assembly remains in contact with the pipe end face during installation, guaranteeing that all air passes through the filter 810.

[0033] A sleeve 87 is provided between the baffle 84 and the filter assembly. A connecting rod 813 connected to the outer shell 81 passes through the middle of the sleeve 87. Movable rods 88 are movably provided inside both ends of the sleeve 87. One end of the movable rod 88 is hinged to the baffle 84, and the other end of the movable rod 88 is hinged to the filter assembly. Brush bristles 811 are provided on the outer shell 81, located on one side of the filter assembly. The sleeve 87 and the movable rod 88, which swing around the connecting rod 813, keep the baffle 84 and the filter assembly moving in opposite directions. That is, when the baffle 84 rises to open the pipe, the filter assembly moves downward to fit against the end face of the other pipe to filter dust; when the baffle 84 descends to block the pipe, the filter assembly rises to allow the filter 810 to protrude from the outer shell 81. The brush bristles 811 sweep away the dust from the protruding filter 810, reducing the manual cleaning of the filter 810 and achieving the purpose of saving labor, while ensuring that the filter 810 maintains its filtering effect.

[0034] The filter assembly in the first pipe 1 is located on the side of the baffle 84 away from the first fan 2; the filter assembly in the connecting pipe 4 is located on the side of the baffle 84 away from the connection between the connecting pipe 4 and the first pipe 1; the filter assembly in the second pipe 5 is located on the side of the baffle 84 away from the gas turbine casing 6. By adopting the above-mentioned filter assembly installation positions, it is ensured that the pipe will not leak air when the filter assembly is extended.

[0035] To further prevent dust swept by the brush 811 from falling into the pipe, a fan 812 is installed on the opposite side of the brush 811 to blow away the dust that falls on the filter screen 810, so as to prevent dust from entering the pipe from the opening.

[0036] The operation of the filter assembly extending out of the outer casing 81 can be controlled at any time as needed to ensure the filtration performance of the filter assembly.

[0037] The bottom of the outer casing 81 is provided with a funnel-shaped collection trough 85, and a sealing head 86 is detachably connected to the lowest point of the collection trough 85. The collection trough 85 is provided to collect the dust that is shaken off, and the dust can be discharged from the bottom after the sealing head 86 is removed.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An improved duct structure for ventilated casing, comprising a first duct (1) and a second duct (5), wherein the first duct (1) is connected to a syngas casing (3) and a first fan (2) that blows air into the syngas casing (3) under positive pressure, and the second duct (5) is connected to a gas turbine casing (6) and a second fan (7) that draws air from the gas turbine casing (6) under negative pressure, characterized in that, A connecting pipe (4) is connected between the first pipe (1) and the second pipe (5). One end of the connecting pipe (4) is located on the side of the first blower (2) away from the syngas casing (3), and the other end of the connecting pipe (4) is located between the gas turbine casing (6) and the second blower (7). Both the first pipe (1) and the second pipe (5) are provided with baffle assemblies (8) for opening and closing the pipes. The baffle assembly (8) on the first pipe (1) is located on the side of the connecting pipe (4) away from the first blower (2), and the baffle assembly (8) on the second pipe (5) is located between the connecting pipe (4) and the second blower (7). The baffle assembly (8) includes a housing (81) fixedly sleeved on two spaced pipes, and a baffle (84) slidably connected to the housing (81) is provided inside the housing (81). One side of the baffle (84) is attached to the end face of one of the pipes, and the baffle (84) is connected to a driving device for driving the baffle (84) to move radially along the pipe. A filter assembly is provided inside the outer casing (81), the filter assembly is attached to the end face of another pipe, the filter assembly includes a support frame (89), and a filter (810) is installed in the support frame (89). A sleeve (87) is provided between the baffle (84) and the filter assembly. A connecting rod (813) connected to the outer shell (81) is movably passed through the middle of the sleeve (87). Movable rods (88) are movably provided inside both ends of the sleeve (87). One end of the movable rod (88) of the sleeve (87) is hinged to the baffle (84), and the other end of the movable rod (88) of the sleeve (87) is hinged to the filter assembly. A brush bristle (811) located on one side of the filter assembly is provided on the outer shell (81).

2. The improved duct structure for enclosure ventilation according to claim 1, characterized in that, A baffle assembly (8) is also provided on the connecting pipe (4).

3. The improved duct structure for enclosure ventilation according to claim 1, characterized in that, The driving device includes a motor (82) connected to a lead screw (83), which is threaded into a baffle (84).

4. The improved duct structure for enclosure ventilation according to claim 1, characterized in that, The two sides of the support frame (89) are slidably connected to the outer shell (81), and the upper end of the support frame (89) is movably sealed through the outer shell (81).

5. The improved duct structure for enclosure ventilation according to claim 1, characterized in that, A fan (812) is provided on the housing (81) on the side of the filter assembly away from the bristles (811).

6. The improved duct structure for enclosure ventilation according to claim 1, characterized in that, The bottom of the outer shell (81) is provided with a funnel-shaped collection groove (85), and a sealing head (86) is detachably connected to the lowest point of the collection groove (85).

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