The inlet speed of gas-fired hot-water boiler laundry steam machine before start-up should not be too fast, usually no less than 4 hours in winter, and 2-3 hours in other seasons, especially in the initial stage of water intake. The inlet temperature of a gas-fired hot water boiler is generally 50 °C, so the difference between the feed water temperature and the steam wall temperature in the drum is less than 40 °C. For gas-fired hot water boiler, the inlet water temperature can be equal to that of steam drum wall without complete cooling, otherwise the inlet water speed should be slowed down. When feed water enters the drum, it always first touches the lower part of the drum. If the difference between the feed water temperature and the drum wall temperature is too Large, the inlet speed is fast, and the upper and lower walls of the drum, the inner and outer walls will have a large expansion. Bad, on the drum caused a lot of additional stress, resulting in drum deformation, serious cracking. Due to the thickness and slow expansion of the drum wall, the tube wall connected to the drum wall is thinner and expands faster. If the inlet temperature of the gas-fired hot water boiler is too high or the inlet speed is too fast, the expansion will be uneven, the welded joint will appear cracks and the gas-fired hot water boiler will be damaged. The inner diameter of the decompression tube is usually φ 7~13mm (water and steam), and its length should not be too long (< 60m). Straightness of pressure pipe If the diameter is too small and the length is too long, it will affect the dynamic transmission of pressure measurement and increase the dynamic error. The inner diameter is too large to be easily maintained and installed. Pressure pipes should not be placed in the horizontal part to prevent the accumulation of bubbles (when measuring liquids) and water columns (when measuring gases). The pressure tap shall be perpendicular to the flow of the medium. Pressure faucet must not have chamfer, flange and burr. When measuring the hydraulic pressure of an electrically heated steam boiler, the pressure outlet should be removed from the lower part of the pipe to prevent the gas in the liquid from entering the pressure guide pipe; When measuring the gas pressure, remove the pressure splice from the upper part of the pipe to prevent dust and dust in the gas The droplets enter the ignition line. The installation site of the electric heating steam boiler pressure gauge (pressure transmitter) should meet the environmental conditions (temperature, humidity, vibration, etc.) used by the instrument, and should be easy to observe, repair and ensure safety. Insulation should be laid on pressure pipes in high temperature media to avoid burning during flushing. Pressure lines are equipped with needle valves (for cutting off pressure in the event of pressure line failures during operation), auxiliary needle valves (for use with instruments, stopping, replacement), condensing coils and elbows (isolation elastic elements from high-temperature media), Easy to install sealing gaskets) as well as sewage valves and sewers. For special pressure measurements, it's still pressing. Install discharge valve, isolation room and so on in the force pipe.
June 22, 2018 in the evening around 6:40, Chongqing Hechuan keel village "Ding taste the food factory" boiler laundry steam machine exploded, the accident killed two people, three people were injured.
At the scene, boiler room Zhata, damaged boiler flew ten meters outside the field, next to a few factories are subject to different degrees of damage, around the ruins. But because not many nearby residents, no adverse impacts to other villagers.
According food factory owner friends when the accident occurred, both inside and outside the boiler room just five people. One person was killed and four people were injured, one of whom died en route to hospital, the other three in stable condition and is currently being treated in. It is understood, Ding taste the food factory is a small tofu factory, usually only a few factory workers. When the accident occurred, it is time off work, the boss's father, Huang uncle went to the boiler room, prepare a little help, but I do not know which part of improper operation, resulting in an explosion.
The boiler explosion, resulting in serious consequences and impact, but also sounded a warning for the steam boiler is using various food processing plants. Steam boiler output to high-temperature steam, with a certain risk, in use, to operate in strict accordance with the provisions, not miss any details, nor allow non-professional staff stoker boiler operation to avoid unnecessary losses.
1, boiler factory should be accompanied by "technical safety specifications of the design documents, product quality certification, safety and the use and maintenance instructions, supervision and inspection certificate (safety supervision and inspection certificate performance)."
2, boiler installation, maintenance, alteration. Engaged in the installation of the boiler, maintenance, renovation of the unit shall obtain special equipment installation and maintenance certificates issued by the Provincial Quality and Technical Supervision, before engaging in the boiler installation, maintenance, alteration. Construction unit before construction will be prepared for installation, maintenance, alteration in writing inform the special equipment safety supervision and management department of the municipality or district, and will start informing sent to the local county level Quality and Technical Supervision for the record, told immediately after construction.
3, inspection of boiler installation, maintenance, transformation. After construction, the construction unit of Special Equipment To Quality and Technical Supervision, Inspection and declared the boiler installation supervisory inspection and hydrostatic testing. After passing by the Quality and Technical Supervision, Special Equipment Inspection, County of Quality and Technical Supervision involved in overall acceptance.
4, registration boiler. After the boiler inspection, the use of units must be in accordance with the "special equipment registration and use of management rules", fill "boiler (census) Registration Form" to the Quality and Technical Supervision registered, and obtain a "safe use of special equipment registration certificate" .
5, operation of the boiler. Boiler operation must be performed by trained and qualified to obtain "special equipment operator certificate" certified personnel to operate, must strictly abide by the rules and eight systems, six record.
6, check the boiler. Periodic inspection of boiler once a year, not be used without safety periodic inspection of boilers. Safety accessories safety valve of the boiler regular inspection once a year, pressure gauge biannually verified, may not be used without the periodic inspection of the safety accessories.
4 tons of fuel boiler laundry steam machine Product description: 4 tons of fuel oil boiler is heated by a burner, fuel atomization effect, fuel combustion, can not see the chimney smoke, so the green fuel boilers, energy efficient. After spraying fuel through the burner into the furnace in the atomized droplets, and easily mixed with air and the rapid combustion heat flash. Compared with coal-fired boiler with the same capacity, and parameters, which furnace volume heat intensity may be increased about twice. But to reduce the thermal load of the burner zone, in order to avoid overtemperature waterwall tubes in this area, so the furnace volume is only reduced by about 1/3. Because the ash content of fuel oil is small, without slagging in the convection heating surface, it allows the furnace exit gas temperatures as high as 1300 ~ 1350 ℃, and narrow a pitch between the convection heating surface to increase the flue gas velocity, thereby increasing the heat transfer coefficient of the heating surface, the heating area savings and steel. Features: 1, the boiler burner automatic combustion control in accordance with instructions, stop, separate control box has a number of security, performance, security and stability, low maintenance. 2, the inner fire tube inserted spoiler retardant, smoke slow speed, to strengthen the heat exchanger, combustion heat conducting large extent to the water, the low temperature flue gas discharged from the smoke chamber, reducing heat loss and save fuel. 3, the water level sensor water level real-time monitoring, to continuously monitor the water level is normal furnace. While controlling the temperature and replenishment level sensor solenoid valves, the boiler water may be continuously supplied. 4, centrifugal multi-layer insulation glass wool, steel for packaging famous white color, heat loss, anti-rust appearance. 5, the product is widely used in hospitals, schools, hotels, hotel, bath center and other enterprises. Boot check: 1, various instruments, whether the instrument to confirm the adequacy of fuel tank, and the inlet valve is opened. 2, confirm the soft capacity and the water tank boiler water quality meets the requirements of the main valve is opened and boiler feed water inlet valve. 3, rotation of the oil filter to remove debris. 4, drain the remaining water in the boiler, while the opening operation of the low level alarm and chain. Boiling furnace process: 1, before the new boiler furnace should be boiled to remove impurities and dirt inside the boiler, or trisodium phosphate soda cooking oven may be employed to prepare a 20% concentration was added furnace (not note the solid directly into the furnace). 2, after closing the steam valve and the water table Hancock, opening the vent valve according to the procedure stoker firing power may be low heat and temperature rise at the beginning, when there is moisture in the furnace, close the vent valve when the valve is discharged from the vent, the furnace pressure is raised to be at around 0.1MPa, the boiler should be checked for leakage and various accessories such as fittings, if any leakage should be promptly fastened. 3, when the pressure in the furnace reached 0.3MPa, the normal shutdown program shutdown, let the furnace pressure decreased to 0.1MPa or less, the drain valve open, give up all the water in the furnace. 4, opening into the hole, rinsed with soft water inside the boiler until the washing water coincides with the degree of acid-base soft water, after closing and opening into the hole Hancock water gauge. 5, after the completion of cooking stove washing, all restore normal operation, before normal operation stoker.
Gas pressure hot water boiler laundry steam machine pressure introduction gas hot water boiler: gas pressure hot water boiler pressure vessel belongs, as always pressure hot water boiler is full of water, so no water level, but to be fitted with pressure gauges, safety valves and thermometers. Circulating pump pressure hot water boiler heating system is generally used in water pump, which is pumping systems engineering backwater sent to the boiler, it is necessary to overcome the resistance of the systemic circulation, but also to maintain a certain pressure boilers, hot water does not guarantee high temperature vaporization . Pressure hot water boiler can not only supply low-temperature water, but also to supply hot water Features: 1, boiler design, manufacturing, supervision and inspection are strictly according to "hot water boiler Safety Supervision" ensure long-term security and stability of the boilers. 2, the boiler body is a shell type three return all wet back downstream pyrotechnic pipe structure, large combustion flame in combustion chamber a slight positive pressure, combustion heat load is low, less NOx emissions of harmful substances. Through advanced machine test bed to test several times to verify the boiler under various load operation can get good thermal performance, qualified flue gas emissions targets as well as a wide range of burner adapter. 3, before and after the boiler smoke box with a special heat insulation materials, high temperature, low thermal conductivity, good anti-radical quenching heat capacity, greatly extending the life of the smoke box. A lower smoke box is provided with a condensate drain, water condensed reduce corrosion of the pressure receiving member. 4, the boiler and each pot spout means disposed reasonable to optimize the pot water circulation, prevent scale generation, but also help to improve the water side heat transfer. Set hand hole, inspection hole in the poor circulation of weak links, to facilitate regular inspection and maintenance. 5, the temperature of the boiler smoke box structure compared to dry wet back boiler back, greatly reduced, the smoke box solves the frequent need to maintain the operation of the phenomenon; 6, a large volume of water boiler design, the load fluctuation of furnace not sensitive to large changes in the load range of users still apply. 7, industrial boilers professional artists and designers carefully designed appearance, novel and unique and yet with the surrounding environment coordination. Sino-Swiss boiler completely changed the image of heavy industrial boilers, industrial boilers is a new concept of low-carbon twenty-first century. Construction and installation points: 1 explosion-proof door is provided on the fuel, the rear of the gas-fired boiler or pipe smoke, explosion door location should be conducive to explosion venting. For gas explosion likely to endanger the safety of the operator occasions, should be installed on the guide tube pressure relief blast doors. 2. Installation of boiler and its auxiliary equipment, water treatment equipment should meet the technical requirements of the device manufacturer. Equipment foundation must be the arrival of equipment and after verification and design drawings before construction. 3. When mounting the device, the device should be avoided, to install the floor material are collected together. Column using a construction, the beam lifting device, must first verify that the carrying capacity of the beam, the column. 4. After the pressure test acceptance oil, gas, water, steam pipe installation, according to "Industrial metallic pipeline construction and acceptance" in GB50235-1997. The main construction practices and node configuration detail see National Building Standard Design Atlas. 02R110 "Gas (oil) boiler room engineering design and construction Atlas" 02R111 "small vertical, horizontal tank Atlas" 02R112 "Tank dome Atlas"
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