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CN-121992877-A - Ammonia gas leakage prevention protection shed for ammonia dual-fuel host detection and control method

CN121992877ACN 121992877 ACN121992877 ACN 121992877ACN-121992877-A

Abstract

The invention discloses a protection shed for preventing ammonia leakage for detecting an ammonia dual-fuel host and a control method, belonging to the technical field of production and detection of the ammonia dual-fuel host; the protective shed comprises a protective shed body, a transparent protective door system, an exhaust filtering system, a spraying system and an ammonia gas detection system, wherein the protective shed body consists of a metal support, a metal cross rod, a top plate and a wallboard, the transparent protective door system is rapidly closed through a worm and gear transmission mechanism, the exhaust filtering system is used for purifying ammonia gas by adopting four-stage filtering combination, the spraying system forms a water mist curtain through a square pipe and a spray head, and a controller is used for carrying out three-stage threshold judgment according to signals of an ammonia gas detector to realize multi-stage linkage protection of detection, closing, exhaust, filtering and spraying. The invention solves the problems of quick closing, efficient purification and accurate control of ammonia leakage during ammonia dual-fuel host detection, and improves the safety and continuity of detection operation.

Inventors

  • ZHANG JINCHANG
  • CUI YUANSHENG
  • GUO JUN
  • WANG QINGZHEN

Assignees

  • 中国船舶集团国际工程有限公司

Dates

Publication Date
20260508
Application Date
20260206

Claims (10)

  1. 1. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage is characterized by comprising a protection shed body, a transparent protection door system, an exhaust filtering system, a spraying system and an ammonia detection system; The protective shed body comprises a metal support (1), a metal cross rod (2), a top plate (3) and wall plates (4), wherein the metal cross rod (2) is fixedly installed at the top of the metal support (1), the top plate (3) is arranged at the top of the metal cross rod (2), the wall plates (4) are fixedly installed at two sides of the metal support (1), and the front face of the metal support (1) is an open mouth; the transparent protective door system comprises a winding box (5), a winding rod (6), a transmission mechanism, a transparent protective door (10) and a motor (9), wherein the winding box (5) is fixedly installed on the front surface of the metal support (1), the winding rod (6) is movably installed inside the winding box (5), the transmission mechanism is arranged inside the winding box (5) and is in transmission connection with the winding rod (6), the motor (9) is connected with the transmission mechanism and is fixedly installed on the surface of the inner wall of the winding box (5), and the transparent protective door (10) is movably connected to the surface of the winding rod (6) and can lift along the opening direction of the winding box (5) so as to close or open the opening on the front surface of the metal support (1); the exhaust filtering system comprises an exhaust fan (11), a through hole (12), an exhaust cover (15), a filtering box (16) and a fan (17), wherein the exhaust fan (11) is fixedly arranged at the top of the top plate (3), the through hole (12) is formed in the top plate (3), the exhaust cover (15) is fixedly arranged at the top of the through hole (12) and is communicated with the exhaust fan (11), one end of the filtering box (16) is communicated with the exhaust cover (15), the fan (17) is communicated with the other end of the filtering box (16), and the exhaust filtering system is used for exhausting, filtering and purifying ammonia in the protective shed; The spraying system comprises square tubes (23), spray heads (24) and water inlet tubes (25), wherein the square tubes (23) are fixedly arranged at the bottoms of the metal cross bars (2), a plurality of the spray heads (24) are communicated with the bottoms of the square tubes (23), and the water inlet tubes (25) are communicated with the surfaces of the square tubes (23) and are communicated with a water source; The ammonia gas detection system comprises an ammonia gas detector (26) and an air inlet, wherein the ammonia gas detector (26) is fixedly arranged on the inner side of the metal bracket (1), and the air inlet is arranged on the wall on the back of the metal bracket (1); The controller controls the motor (9) to drive the transparent protective door (10) to descend and seal according to a detection signal of the ammonia detector (26), controls the exhaust fan (11) and the fan (17) to start exhaust, and controls the water inlet pipe (25) to spray through water, so that detection-sealing-exhaust-filtering-spraying multi-level linkage protection is formed.
  2. 2. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1 is characterized in that the transmission mechanism comprises a worm wheel (7) and a worm (8), the worm wheel (7) is fixedly installed on the surface of the winding rod (6), the worm (8) is meshed with the surface of the worm wheel (7), an output shaft of the motor (9) is fixedly connected with the bottom of the worm (8), the top of the worm (8) is movably connected with the surface of the inner wall of the winding box (5) through a bearing seat, when the ammonia concentration detected by the ammonia detector (26) exceeds the standard, the controller starts the motor (9) to drive the worm (8) to rotate, and drives the worm wheel (7) and the winding rod (6) to rotate, so that the transparent protection door (10) descends to seal the protection shed.
  3. 3. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1 is characterized in that a plastic plate (13) is movably connected to the surface of the inner wall of the through hole (12) through a shaft pin, a stop bar (14) is fixedly arranged at the top of the plastic plate (13), the stop bar (14) is located at one side, far away from the shaft pin connection end, of the plastic plate (13), the plastic plate (13) keeps horizontally sealing the through hole (12) under the action of gravity, and is turned upwards to be opened under the action of exhaust air flow of the exhaust fan (11).
  4. 4. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1 is characterized in that a polyester fiber mesh (18), granular activated carbon (19), a 4A type molecular sieve (20) and high-efficiency melt-blown cloth (21) are sequentially arranged in the filter box (16) from an input end to an output end, a sealing plate (22) is movably connected to the top of the filter box (16) through a shaft pin, the polyester fiber mesh (18) is used for filtering large-particle impurities, the granular activated carbon (19) is used for adsorbing ammonia molecules, the 4A type molecular sieve (20) is used for selectively adsorbing small-molecule gas, and the Gao Xiaorong spray cloth (21) is used for finely filtering residue particles.
  5. 5. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1, wherein a plurality of metal cross bars (2) are fixedly installed between the tops of two metal brackets (1) in parallel, the top plate (3) is paved above the metal cross bars (2), the wall plates (4) are fixedly installed on two sides and the back of the metal brackets (1), the air inlets are arranged on the lower portion of the wall plates (4) on the back, the air inlets and the exhaust fan (11) form an air flow channel from bottom to top, and a cross flow field is formed between the air inlets and the spraying direction of the spraying system.
  6. 6. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1 is characterized in that a plurality of square pipes (23) are fixedly installed at the bottom of a metal cross rod (2) in parallel, a plurality of spray heads (24) are communicated with the bottom of each square pipe (23), an electromagnetic valve is arranged on a water inlet pipe (25), the electromagnetic valve is controlled to be opened by a controller according to detection signals of an ammonia detector (26), water is enabled to form a water mist curtain through the square pipes (23) and the spray heads (24), the spraying system is linked with an exhaust filtering system, and the water mist is discharged through the exhaust filtering system after being adsorbed with ammonia.
  7. 7. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage according to claim 1 is characterized in that an ammonia detector (26) is arranged at the middle position of the inner side of the metal support (1) and used for monitoring ammonia concentration in the protection shed in real time, when the ammonia concentration exceeds a first preset threshold value, the controller starts the transparent protection door (10) to descend and the exhaust filtering system to work, when the ammonia concentration exceeds a second preset threshold value, the controller starts the spraying system, when the ammonia concentration exceeds a third preset threshold value, the controller starts an audible and visual alarm device, and the first preset threshold value is smaller than the second preset threshold value and the second preset threshold value is smaller than the third preset threshold value.
  8. 8. The ammonia dual-fuel host machine detection protection shed for preventing ammonia leakage of claim 7, further comprising a communication device; When the ammonia gas detector (26) stops sending out the alarm signal, the controller records the occurrence position, the occurrence time, the concentration peak value and the treatment measures of the current leakage event, and generates a report to be maintained and sends the report to a monitoring center through the communication device.
  9. 9. A control method of a protection shed for ammonia gas leakage prevention for ammonia dual-fuel host detection, which is characterized by being applied to the protection shed as claimed in any one of claims 1-8, and comprising: Collecting signals of the ammonia gas detector (26) in real time, and monitoring the concentration of ammonia gas in the protection shed; If the ammonia gas detector (26) detects that the ammonia gas concentration exceeds a first preset threshold value, starting the motor (9) to drive the transparent protective door (10) to descend to form a closed protective shed, and simultaneously starting the exhaust fan (11) and the fan (17) to perform exhaust filtration; if the ammonia concentration exceeds a second preset threshold value, opening an electromagnetic valve of the water inlet pipe (25) to spray; if the ammonia concentration is reduced to a safe range after the preset time, stopping spraying and exhausting, and lifting the transparent protective door (10); If the ammonia concentration continuously exceeds a third preset threshold value within the preset time, starting audible and visual alarm and continuously exhausting and filtering until manual intervention.
  10. 10. An ammonia dual-fuel host detection system, comprising the ammonia leakage prevention protection shed for ammonia dual-fuel host detection according to any one of claims 1-8.

Description

Ammonia gas leakage prevention protection shed for ammonia dual-fuel host detection and control method Technical Field The invention relates to the technical field of production and detection of ammonia dual-fuel hosts, in particular to a protection shed for preventing ammonia leakage for ammonia dual-fuel host detection and a control method. Background With the increasing strictness of the International Maritime Organization (IMO) on the carbon emission requirements of ships, the application of ammonia fuel as a zero-carbon energy source in the field of ship power is receiving a great deal of attention. The ammonia dual-fuel host is used as a ship core power device, and a plurality of performance tests including fuel injection system tests, combustion performance tests, tightness tests and the like are required to be carried out in the production and manufacturing process. The risk of ammonia leakage exists in the detection process, and the risk is formed on the health of operators and the surrounding environment. In the prior art, the treatment measures of ammonia leakage usually adopt a mode of strengthening ventilation or open water curtain dilution. For example, roof ventilator and spray systems are provided in ammonia fuel engine assembly plants to reduce ammonia concentration by large space ventilation and physical absorption. However, this open processing method has the following technical problems: First, open ventilation does not effectively limit ammonia diffusion when the ammonia leakage is large, and ammonia may still escape to surrounding areas, causing environmental pollution and personal injury. Second, the open water curtain dilution requires consuming a lot of water resources, and absorption efficiency is greatly influenced by environmental temperature and humidity, and purification effect is unstable. Third, existing treatment systems lack a quick closing mechanism, which cannot timely isolate the leakage source at the initial stage of leakage, resulting in continuous leakage of ammonia gas. Fourth, the existing system has a single response strategy, and usually adopts a mode of detection, namely maximum response, so that excessive protection is easily caused, and continuity and efficiency of detection operation are affected. Therefore, how to provide a protection device capable of rapidly closing a leakage space, efficiently purifying ammonia gas and realizing accurate grading response during ammonia dual-fuel host detection is a technical problem to be solved in the art. Disclosure of Invention The invention aims to provide a protection shed for preventing ammonia leakage for detecting an ammonia dual-fuel host and a control method, so as to solve the problems in the prior art. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides an ammonia dual-fuel host computer detects and uses protection canopy that prevents that ammonia from leaking, includes protection canopy body, transparent guard gate system, exhaust filter system, spraying system and ammonia detecting system; The protective shed body comprises a metal support, a metal cross rod, a top plate and wall plates, wherein the metal cross rod is fixedly arranged at the top of the metal support, the top plate is arranged at the top of the metal cross rod, the wall plates are fixedly arranged at two sides of the metal support, and the front surface of the metal support is an open mouth; The transparent protective door system comprises a winding box, a winding rod, a transmission mechanism, a transparent protective door and a motor, wherein the winding box is fixedly arranged on the front surface of the metal bracket, the winding rod is movably arranged in the winding box, the transmission mechanism is arranged in the winding box and is in transmission connection with the winding rod, the motor is connected with the transmission mechanism and is fixedly arranged on the surface of the inner wall of the winding box, and the transparent protective door is movably connected on the surface of the winding rod and can be lifted along the opening direction of the winding box so as to close or open the opening of the front surface of the metal bracket; The exhaust filtering system comprises an exhaust fan, a through hole, an exhaust hood, a filtering box and a fan, wherein the exhaust fan is fixedly arranged at the top of the top plate, the through hole is formed in the top plate, the exhaust hood is fixedly arranged at the top of the through hole and is communicated with the exhaust fan, one end of the filtering box is communicated with the exhaust hood, the fan is communicated with the other end of the filtering box, and the exhaust filtering system is used for exhausting, filtering and purifying ammonia in the protective shed; the spraying system comprises a square tube, spray heads and a water inlet tube, wherein the square tube is fixedly arranged at the bottom of the