Why is it necessary to install a gas alarm in the boiler room

The fuel used in the boiler room is natural gas. According to GB 50041-2008 boiler room design code, combustible gas alarm shall be set. When there is alkene gas or volatile steam of flammable and toxic gas in the air, the detector detection signal is immediately transmitted to the alarm control unit through the cable, and the controller displays the gas concentration. When the set alarm concentration value is exceeded, the alarm controller will send out audible and visual alarm signals and output linkage control signals to control the fans and other equipment to eliminate dangerous situations, so as to ensure the safe production of the plant and avoid accidents. Qb200n combustible gas alarm of Henan Chicheng Electric Co., Ltd. is recommended for detecting natural gas leakage in boiler room.

Why is the gas alarm installed in the boiler room?

The main component of natural gas is methane, which is a flammable and explosive gas. In a confined space, people will lack oxygen, suffocate or even die. The installation of natural gas alarm can effectively monitor gas leakage, so as to avoid the safety of property and staff. The function of the gas alarm is to detect the leakage concentration of natural gas. Once the leakage concentration exceeds the standard, the gas alarm will immediately send an alarm signal to remind the staff to take safety emergency measures. In order to ensure the reliability of product performance, we recommend users to regularly maintain and calibrate the product within the service life of the gas alarm. If you have any questions, please ask a professional technician for advice.

Cause analysis of natural gas leakage in boiler room

The natural gas leakage in the gas-fired boiler room is mainly caused by the following reasons, in addition to the illegal operation of employees and natural and external forces.

1. Leakage of indoor and outdoor gas pipelines: poor construction quality during construction, or corrosion of long-term operating pipelines.

2. Boiler body leakage: the gas-fired boiler was not constructed according to relevant technical requirements at the initial stage of design or installation. If the boiler mode wall is not welded tightly; The furnace is not dried up according to the relevant technical requirements after construction, or the boiler temperature rises and falls too fast, and the brick joint of the furnace wall is cracked and not sealed tightly; When the gas-fired boiler is running, the vibration is large, the welding seam is desoldered or the insulation layer of the furnace wall is cracked; The fire observation hole, explosion-proof door and manhole door are not closed tightly; The boiler shuts down automatically during operation.

3. Burner leakage: design reasons or inadequate installation and commissioning; After long-term operation of the burner, the air-fuel ratio is misadjusted, which changes the combustion conditions.

4. Leakage of control, adjustment, measurement and other parts and their connecting parts: the frequent action of these parts may cause inflexible switch and lax closing, or loose natural gas leakage at the connecting parts due to large vibration during boiler operation, or lax closing due to poor quality of control, adjustment, measurement and other parts; Or leakage due to aging of flange, sealing gasket, sealant, etc.

In case of serious natural gas leakage in the boiler room, the following phenomena will occur:

1. The working pressure of natural gas changes.
2. Strong air flow sound can be heard near the leakage source.
3. The hand-held alarm will make abnormal sound.
4. In case of large leakage (high concentration), the fixed alarm will give an automatic alarm and automatically start the exhaust fan.
5. Serious accidents such as explosion and fire of boiler body or natural gas pipeline may occur.

Preventive measures for natural gas leakage in gas-fired boiler room

The design and construction of the gas-fired boiler room shall be carried out in strict accordance with the relevant provisions of gb50041-1992 code for design of boiler rooms. The design and construction shall be carried out by professional design units with design qualifications and units with construction qualifications, so as to make the boiler room more standardized in the design and construction stage, eliminate unsafe hidden dangers and prevent natural gas leakage.

(1) Establish and improve various safety management systems of the workshop.

(2) Strengthen the staff education and training, and Practice on one week and two questions per month. There are also regular accident drills to improve the safety prevention and emergency response capacity of employees.

(3) . use scientific means and existing detection instruments to find out the hidden dangers of leakage in time and take preventive measures in advance.

Detection means

(1) Judge according to the smell and hearing of patrol inspectors.

(2) . soapy water detection.

(3) . natural gas leakage alarm detection

Emergency treatment for natural gas leakage in gas boiler room:

Basic methods and procedures for treatment of found natural gas leakage

Leakage of outdoor gas pipeline. Immediately notify the pressure regulating station of the gas company to cut off the gas source, report to the safety and production department of the company, and deal with it according to the emergency plan for natural gas leakage.

Immediately shut down the boiler, cut off the main gas valve of the boiler room, notify the gas company to adjust the gas supply pressure, report to the company’s safety and production department, and deal with it according to the natural gas leakage emergency plan.

Boiler body leakage

1. Emergency shutdown (press the emergency shutdown button).
2. Close the main natural gas valve of the boiler and cut off the gas source.
3. Handle according to the emergency plan for natural gas leakage.

Burner leakage

Immediately shut down the boiler, cut off the main gas valve of the boiler, report to the safety and production department of the company, deal with it according to the emergency plan for natural gas leakage, and organize relevant technicians to rectify.

In case of leakage of control, adjustment, measurement and other parts and their connecting parts, the boiler shall be shut down immediately, the main gas valve of the boiler shall be cut off, the control, adjustment, measurement and other parts shall be replaced, and the leaking connecting parts shall be resealed.

Problems needing attention when handling natural gas leakage:

Organize treatment in strict accordance with relevant regulations and procedures on natural gas leakage in boiler room.

Contact relevant departments of gas companies and heat supply companies in time, and cut off the natural gas supply if necessary; If natural gas replacement is required, it must be replaced as required; If the procedures for hot work need to be handled, they must be handled in accordance with the regulations. If the maintenance needs a professional team, a qualified professional team must be appointed for construction.

For various possible leakage accidents, organize the preparation of relevant treatment plans and emergency plans, and do a good job in the drill of each emergency plan.

Reserve special materials for handling leakage accidents, emergency fire-fighting materials, testing tools, etc. To deal with the leakage, the full-time safety officer of the workshop shall be assigned to take charge of the site and carry out relevant technical disclosure to relevant personnel. After the treatment, ensure that the materials are used up and the site is clean, and carefully fill in the technical data.

Henan Chicheng Electric Co., Ltd. focuses on the production of gas detection alarms. It has an independent R & D team. The gas detection alarms produced by it have good performance, reliable quality and complete functions. They have become the choice of many industrial and commercial places and tens of millions of families. Welcome to click and consult online customer service for free.