10 ton mobile electric heating boiler manufacturing companies

Classification and selection fuel gas boiler thermal control system: a fuel gas heat boiler control system classification (1) a combination of an electric system for an electric meter instrumentation system consists of relays, time relays, the relay program composed of program control and interlock system; or by the electronic control and intelligent digital series instrument, measuring instruments display, sound and light alarm monitoring instrumentation and control system and other components. Electric instrumentation system design experience mature, the price is cheap, but it is difficult to achieve system redundancy, remote data transmission, maintenance is more difficult, more difficult to implement advanced control methods. Electric meter system is mainly used for small boilers, but the electronic control Applications for closed-loop regulation of decreasing almost been replaced by intelligent multi-function instrument, the following sections mentioned electronic control just want to take advantage of familiar industry and series instrument combination that's widely used to illustrate the principle of regulating system and constitution. (2) programmable control system programmable control system is the core of programmable logic controller (PLC). Programmable logic controllers are widely used in the initial control, since the 1990s has increased the ability of process control, the programmable logic controller in the field of process control applications more widely. Programmable controllers typically use a modular structure having a self-diagnostic and communication capabilities, can completely replace the relays, time relays, and a relay circuit for the logical functions. In a continuous control, input analog may be, for performing mathematical operations, it is easy to implement advanced control functions electric instrument system difficult to achieve. (3) The microcomputer control system: This system is Direct Digital Control (DDC) system, which is the core of the microcomputer. Figure 7-1 is a block diagram of a microcomputer controlled system. Microcomputer automatic control system can show you all of the parameters of boiler operation, and dynamic display of important parameters and alarm recording boiler operating conditions, the storage boiler operation, timing and instant print reports. The microcomputer-controlled powerful computing system, may be implemented to optimize the combustion control and other advanced control can also be linked into a network, to realize long-distance data transmission. The microcomputer disadvantage automatic control system reliability is somewhat less, still generally indicate and configure the necessary backup manually-operated unit. But with enhanced anti-jamming performance of industrial microcomputer (IPC), the reliability of microcomputer automatic control system will continue to improve. (4) Distributed Control System (DCS), also known as Distributed Control System distributed computer control system, the production process is centralized monitoring using computer technology, communication technology and redundancy, operation, management and decentralized data acquisition and control of a new types of control technology. Distributed control system is powerful, high reliability, generally used for large boilers and boiler group control. Over the years, DCS vendors in order to meet market demand, the introduction of small flexible mixing process for a variety of applications and devices open control system integration control, more suitable for medium-sized boiler DCS, such as HONEYWELL company's S9000 systems.

At 10:00 on September 6 and more, Harbin, a business is the purchase of a new boiler equipment installation, commissioning process when staff at a boiler pressure gauge index found that the performance of the boiler abnormal, but not so the commissioning personnel when the next step, a sudden loud noise, boiler explosion, a huge flame and furnace pressure debugging of oil spray everywhere, four commissioning personnel are subject to varying degrees of injuries, was taken to hospital for treatment .

Boiler is an energy conversion device, by entering the fuel to the boiler, chemical energy, power, etc., outputs a constant steam heat, hot water or organic heat carrier, to provide support for the heat industries. Meanwhile, the boiler is also a special equipment has a certain risk, when the boiler installation, commissioning, operation, etc., be sure to boiler operation safety first.

Now, Xiao Bian to operational safety considerations gas boiler summarize, we can refer to.

First, start, boost, steam supply

1, before the start of the preparatory work

Internal and external check: Check boiler, burner, a good state of the accessory device; action safety accessories, each of the valves, such as flexible instruments, the correct position.

Check the line voltage to meet the requirements, a variety of normal switch position, respectively, various auxiliary pump starts operating, the burner fan, oil pump is normal.

Boiler Feed: exhaust valve opening, to ensure the normal water level (just below the water level).

2, start

Firstly purging the furnace, induced draft fan suction time is usually about 10 minutes to ensure that no residual gas in the furnace, passing substitutions, and ignition for combustion air supply.

After firing is completed according to the adjustment amount of load required for combustion, the boiler into normal operation.

During startup, to closely monitor changes in water level, water boiler accident or occurrence textile full of water accidents.

Second, the normal operation

1, the water level

Fuel gas-fired boiler water table should be the red line indicating the high, medium and low water level, the operation shall not exceed the maximum safe level or below the minimum safe level.

Rinse water table at least once per shift, when there is suspicion of running water, rinse should always check.

2, steam pressure

Red lines indicate the working pressure gauge should have, so sensitive and reliable, the trap should be flushed at least once a week.

3, safety valve

Safety valve should seal intact, no leakage; once a week manually (or automatically) emission test, and begin start pressure, opening pressure, reseating pressure and test time, participants, etc credited maintenance log book u, for future reference .

4, sewage

Proceed as boiler water quality requirements of water quality testing personnel under the guidance of class 1 or 2 times sewage, sewage incident not too long, generally no more than 10 minutes.

Sewage should (preferably when shutdown), should be closely monitored sewage water level changes, and pay attention to safety at the time of low load, low pressure, high water level.

Many boilers when sharing a sewage mains, while sewage is prohibited.

Third, shutdown

1, the normal shutdown

After normal boiler shutdown should generally be reduced boiler load operation, press the boiler shutdown procedure. Actuated pump water to high water level, pressure steam boiler to be dropped after 0.3MPa flushing water table and sewerage operations, and finally close the raft, cut off the power supply control cabinet, wipe equipment, clean up the environment and health, For water, the water temperature should be below after 70 ℃, before proceeding.

2, emergency shutdown

When the boiler operation in the following situations should immediately shutdown:

Furnace water level drops below the minimum water level gauge visible edges.

Increasing water supply and other measures, but digital still continue to fall.

Boiler water level exceeds the highest visible water table level (full of water), the water still can not see the water level.

All water supply system water pump failure or malfunction, not water to the boiler.

Water gauge or safety valve all the failures.

Endanger the boiler element is damaged and the safety of operating personnel.

Combustion equipment damage, or furnace wall collapse and other red-hot boiler structure is a serious threat to the safe operation of the boiler.

Other anomalies endanger the safe operation of the boiler.

3, maintenance

Before maintenance work should be well prepared, as before entering the drum interior work, must be of sufficient strength to connect all of the metal blocking plate spaced reliable steam, water, sewage and other operation of the boiler pipes, and the drum manholes and hand holes (boiler shell) is opened, so that air convection period.

After the completion of preparations to repair. Should ensure that the quarterly frequency of boiler maintenance and repair of the year.

Advances in technology to the boiler industry into new and innovative ideas, now the boiler manufacturers boiler are easy targets toward the operation forward, but in the use of the boiler, improper operation or other quality problems still exist, these failures will It is causing the direct cause of the explosion boilers. Therefore, when using the boiler must be in strict accordance with safety practices boiler, security incidents strangled in the cradle.

Electric boiler automatically adjust the air-fuel electric boiler premixed combustion, the combustion air conditioning unique technology, electric boiler automatically adjusted according to the load demand air-fuel ratio, the air and gas remain in excellent mixing ratio to achieve complete combustion. Using premixed combustion technology, power regulation range of 20% to 100%, i.e. when lowering the external demand, the boiler module can adjust itself to match the output demand and, module design, the module can start to meet the required load portion, it can be maintained at the same high efficiency low load operation. fully intelligent work, thermal efficiency of 92% on average, each module can be burned separately, a real energy saving. Flexible mounting, electrical automatic modular combination boilers, a single input power to be 240kW, up to 40kW, adjustable range of 20% to 100%, in a larger change in elastic and flexible to meet the heat requirement, even if a certain module failure, additional modules can also work, will not affect the heating requirements, reliability is very high. Variety of security devices, including the flame guard, ignition failure protection, smoke protection, overheating protection, pressure protection, etc. to ensure ease of use. Adaptability of small volume, a single area of ​​0.56 square meters, light weight electric boilers can be installed in a small space, convenient maintenance. Boiler module efficient and environmentally friendly exhaust temperatures than ordinary boiler flue gas temperature, heat loss harmful emissions to meet environmental requirements, low-noise combustion technology, the noise less than 50 decibels, and adjusting the air-fuel ratio does not affect the rest.

Monitoring system of gas-fired boiler and process electronic control system making use of gas-fired boiler in the main function of its air supply system into one that is fixed wind speed and amount of air into the combustion chamber, the main function of the ignition system is to ignite the gas boiler mixture of air and fuel. When the ignition system for a gas boiler is very convenient and time-saving use of the process, while using just a finger press can be used at run-time security is very high, it will not appear in the process of running its unexpected flameout phenomenon. Monitoring system for a gas boiler in use, in that its primary function is to ensure the safety and stability of the burner operation, when the main member using flame detectors, pressure monitor, and temperature monitor other equipment. Function gas boiler fuel system mainly effective amount to ensure that the fuel burner when required, which is mainly composed of a nozzle system, heavy oil preheater, fittings, pumps, tubing and other components in the process of making. Electric control system for a gas boiler is not less than the command center and the focal point for all the system at run-time the main control element is a control box, and effective for their different burners with different process air, a common programmer has LGB series, LAL series, LFL series. Efficient gas-fired boiler that super Daquan Chinese LCD display, the entire device built incandescent night light, the use of the process whether it is night and day, the contents of the screen are clearly visible.