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author： 2020-05-17
In the previous article, we talked about the safety control requirements of gas burners/gas burners. Today, let's talk about the next part. First, let's review that China is rich in natural gas and coal-to-gas (coal) resources.And belong to clean energy, gu has good social and economic benefits.The gas gas burner conforms to the industrial policy of our country, the market prospect is very good, has the development prospect greatly.However, in the development and design of gas burner, the characteristics of gas: inflammable, explosive and toxic, the primary problem of safety control.The following parts of the safety control requirements for gas burner are introduced:
Five, flameout protection: the combustion machine in the combustion process, if the accident flameout, the combustion machine into the protection state.Because the furnace is hot, gas into easy to deflagration, it must be in a very short time to enter the protection state, cut off the gas supply.
The response time shall not exceed 1 second from the time of extinguishing to the time when the burner enters the protective state.
6. Gas excitation level and protection: the stable combustion of the gas burner has a certain range, and only the gas pressure is allowed to fluctuate within a certain range.The purpose of limiting the high and low pressure of gas is to ensure the flame stability: do not take off the flame, do not flameout and do not temper, and limit the output thermal power of the burner to ensure the safe and economical operation of the equipment.When the gas pressure is beyond this range, the burner should be locked to work.
The gas pressure switch is generally used to sense the pressure signal and output the switch signal to control the corresponding work of the burner.
7. Insufficient protection of air pressure: the gas burner is designed with high thermal intensity, and its combustion mode adopts blast air system.If the fan fault caused air interruption or air shortage, immediately cut off the gas, otherwise will occur furnace deflagration or temper to the fan.Therefore, while improving the quality of the fan, the gas control must be linked with the air pressure. When the air pressure is insufficient, the gas supply should be cut off immediately.
General gas pressure switch sense is the air pressure signal, and output switch heavy signal, in order to control the corresponding work of the gas solenoid valve.
Eight, electric protection: the burning machine in the process of work suddenly power, must immediately cut off the gas supply, to protect the safety of the equipment.Gas control solenoid valve must be normally closed, once the power, automatically shut off to cut off the gas supply.Solenoid valve closing response time ≤5s.
Nine, the prevention of gas leakage accident measures: gas leakage includes two aspects, one refers to the gas leakage through the pipeline to the environment, two refers to the gas tongdi magnetic valve valve core toward the furnace leakage.
Environmental leakage may cause poisoning and explosion at work site, which must be taken seriously.First of all, the pipeline should be sealed, and the pipeline leakage should be detected regularly. If the leakage is eliminated, the pipeline can continue to be used. Second, to avoid the concentration of gas causing poisoning and explosion, good ventilation should be required on the work site.In addition, the requirements of the work site prohibit fireworks electrical explosion protection.
A leak in the furnace may cause an explosion in the furnace.There are three ways to solve the problem of leakage in the furnace: - to strengthen the pre-blowing time and blowing volume, blow away or dilute the gas in the furnace;Second, the gas pipeline adopts a solenoid valve series structure to improve the safety of the system;Three is the use of pipeline leakage detection device, before the ignition of the gas pipeline for detection, if the gas leakage reaches a certain amount that the combustion engine locked.
Ok, the above is the next part of the safety control requirements for gas burners/gas burners. If you have any technical problems or product requirements, please contact us. We will serve you 24 hours a day and pay attention to us.