What safety protection measures are required in the boiler control system and how to implement them

There must be a temperature control button in the boiler control system, because the boiler temperature is very high, if the temperature exceeds the standard, a safety alarm should be given immediately, and then the service personnel can immediately change the problem.

The main alarm, protection and interlocking functions of the boiler include:

1.Overheating protection: When the boiler water level is low or the water circulation in the section is poor, the water in the boiler water pipe will become hot and turn into steam due to continuous heating, resulting in overheating. In case of overheating, the over-temperature protection automatically disconnects the power supply to ensure the safe operation of the boiler.

2.Gas Failure Protection: When the gas ** is insufficient or abnormal, the burner will automatically shut down to protect the boiler safety.

3.Circulating pump over Kaiwood flow protection: When the circulating pump is overflowing, the protection device will stop to avoid motor damage, and at the same time, it can also ensure good boiler water circulation.

4.Low water level protection: When the boiler water level is too low, the protection device will stop immediately to prevent the boiler from dry burning, as well as large-area oxidation corrosion.

5.Safety valve: When the boiler pressure is submerged or the force exceeds the set threshold, the safety valve will open to reduce the boiler pressure.

The boiler safety protection device test should be carried out to ensure the safe operation of the boiler. The test includes:

1.Low water level protection.

2.Overheat protection.

3.Gas fail-safe

4.Circulating pump overcurrent protection.

5.Relief valve.

The protective device shall be regularly overhauled, and the test time, content and results shall be recorded in the preservation record book for future reference.

There will be a lot of alarm and joint sail lock functions in the operation of boiler equipment, and you should check the thermal control manual of boiler and generator set for details. To put it simply, it is divided into large interlocking and small interlocking of the car, the large interlock is the protection function between the boiler and the steam turbine and the generator, the small interlock is the protection function between the various equipment of the boiler, and there is also a logical control relationship between the small interlock and the large interlock, which is more complex, and it takes time to learn and understand, and it can be mastered by the guidance of professionals.

Answer]: B Analysis] Boiler safety protection devices include: (1) over-temperature alarm and interlock protection device.

The over-temperature alarm device is installed at the outlet of the hot water boiler, and when the water temperature of the boiler exceeds the specified water temperature, it automatically alarms and reminds the stoker personnel to take measures to reduce combustion. After the over-temperature alarm and interlocking protection device are interlocked, it can also automatically cut off the fuel and stop the drum and induced air at the same time as the over-temperature alarm is known, so as to prevent the hot water boiler from being damaged by over-temperature or causing boiler damage. (2) High and low water level alarm and low water level interlock protection device.

When the water level in the boiler is higher than the maximum safe water level or lower than the minimum safe water level, the water level alarm will automatically send out a digital alarm to remind the furnace personnel to take measures to prevent accidents. (3) Overpressure alarm device. When the boiler overpressure phenomenon, the crow sends out an alarm, and controls the combustion through the interlock device, such as stopping the exhaustion of the fuel and stopping the ventilation, so that the stoker personnel can take measures in time to avoid the boiler overpressure accident.

4) Boiler flameout protection device. When the boiler furnace is extinguished, the boiler protection device acts, cuts off the fuel, and sends out the corresponding signal.

On the first floor are the three safety accessories of the boiler.

There should be more safety protection devices for the pot stove, such as: overpressure interlocking device.

The induced blower refers to the interlocking device.

Low water level automatic shutdown protection device.

And so on, the main ones are these.

The three major safety accessories for passing are: fan interlocking protection device; Water level overrun furnace shutdown protection and overpressure and overtemperature protection, etc.

1. Inspection before ignition.

2. Preparation before ignition.

3. Ignition, pressurization, and heating are controlled and steamed, and the water level is adjusted.

Second, the adjustment of the pressure of the steam mill.

3. Adjustment of steam temperature.

Fourth, sewage discharge. Fifth, soot blowing.

Sixth, the flushing of the water level gauge First, the fire is stopped.

2. Stop the furnace normally.

3. Stop the furnace urgently.

Fourth, stop the furnace maintenance.

Answer]: imaginary band a, b, c, d

This question examines the safety accessories of boilers and pressure vessels. The automatic control device of the boiler belongs to the safety accessories of Qi Feng Boiler, but it does not belong to the protection device.