Introduction to the valves of the thermal oil boiler diesel burner system

　　 With the increasing environmental protection efforts in various places, the scope of use of the three-day tour boiler diesel combustion engine is also increasing Wider. The valve of the heating system is an important part of the heating system. However, due to the irregularities and negligence of the operators, the valve fails, which affects the normal operation of the thermal oil boiler diesel burner. So let's briefly explain below.　　The valve application of the thermal oil boiler diesel combustion engine　　1. To prevent the steam jet from causing harm, the outlet release position of the exhaust pipe should be more than meters higher than the nearby operating platform.　　2. The exhaust steam outlet position should be observed in front of the heat transfer oil boiler diesel burner. If it is discharged outside the diesel combustion engine room of the heat-conducting oil boiler, a leakage hole or a small branch pipe should be installed on the exhaust pipe near the safety valve to know whether to exhaust steam in time. The exhaust pipe should not be equipped with any valve.　　3. At the bottom of the safety valve and exhaust pipe of the thermal oil boiler diesel burner, there should be a drain hole and a drain pipe, and no valve should be installed on the drain pipe.　　The classification of the valves of the heating system of the thermal oil boiler diesel combustion engine　　1, safety valve. His role is to protect the safety of devices and components under pressure. The types of safety valves include heavy hammer safety valves, low-lift safety valves, high-lift safety valves, and spring safety valves. Because the spring safety valve has good air tightness, compact mechanism, can change the spring force, and has a wide range of applications, it is widely used in heat carrier heat transfer oil heating device systems.　　2, stop valve. The cut-off valve is also called the cut-off valve, which can effectively cut off the flow of heat-conducting oil and regulate and control the flow of heat-conducting oil in the system within a certain range. The types of globe valves mainly include angle globe valves and inclined seat globe valves.　　 3. Check valve. Check valve, also called backflow valve, is an automatic shut-off valve, which controls the flow of heat-conducting oil in the direction it meets. If it “backflows” in the reverse direction, a cut-off element will block the cross-section of the heat-conducting oil to prevent it. Reverse flow.　　 4. Gate valve. The gate valve is a fully open or fully closed valve. Its resistance to flow is only 1/20 of that of a stop valve. It is mainly used as a suction valve for a circulating pump. Its characteristic is that the closing action and the flow direction are horizontal. When the gate valve is opened, the stop element is completely drawn out from the flow section, and this section is all open, allowing fluid to flow through without changing the direction. The gate valve is a single stop valve, it is not allowed to be used as a throttle control. Compared with the stop valve, although its cross section is small, its height is much higher and its length is shorter than that of the stop valve. The main types of gate valves are gate valves with inner stem threads and gate valves with outer stem threads.　　Common failures of valves of thermal oil boiler diesel burner　　First of all, valve leakage may be a common problem. The main reason is that the joint surface of the valve core and the valve stem is corroded, worn, scratched or bonded with dirt. It is also possible that the packing is not compacted, uneven or deteriorated. In addition, the tightness of the bolts is different, so that the valve body and the bonnet are not tightly pressed together can also cause the valve to leak.　　The valve stem of the heat-conducting oil boiler diesel burner is not moving, which is also a relatively easy problem for the valve. The reason is that the packing is too tight, the threads on the valve stem and the valve cover are damaged, and the valve stem is bent or stuck due to corrosion. In addition, the damage of the handwheel will also cause the valve stem not to be driven, and the jamming of the gate is also one of the main reasons. Regarding the problem of valve body rupture, the reasons for it are relatively complicated. It may be due to long-term use, small cracks and then enlarged in the collision, or excessive force when tightening the screw or water and ice in the valve body. The problem, if the material of the thermal oil boiler diesel burner valve itself is not good, there are sand holes, pores or eccentricity during casting, then when the valve is actually working, the local strength received Cause the valve body to rupture. The requirements for the sealing performance of the valve for the thermal oil boiler diesel burner should be from the perspective of preventing leakage. According to the different parts and extent of the leakage, the leakage of the valve is different. Therefore, different leakage prevention measures need to be proposed.　　 Of course, simply analyzing the causes of these valve problems is not enough. Related companies must take preventive measures. It is not enough to pay attention to the valve. It cannot be ignored because the valve is only a small part of the thermal oil boiler diesel burner.　　The commonly used terminology for the safety valve of the thermal oil boiler diesel burner 　　 1. Opening pressure: When the medium pressure rises to the specified pressure value, the valve flap will automatically open and the medium will be ejected quickly. At this time, the pressure at the valve inlet is called the opening pressure.　　2. Discharge pressure: After the valve flap is opened, if the medium pressure in the equipment pipeline continues to rise, the valve flap should be fully opened to discharge the rated medium displacement. At this time, the pressure at the valve inlet is called the discharge pressure.　　3. Closing pressure: After the safety valve is opened and part of the medium is discharged, the pressure in the equipment pipeline gradually decreases. When it drops below the predetermined value of the working pressure, the valve flap is closed, the opening height is zero, and the medium stops flowing out. At this time, the pressure at the inlet of the valve is called the closing pressure, also called the return pressure.　　4. Working pressure: The medium pressure in the normal operation of the equipment is called working pressure. The safety valve is now in a sealed state.　　5. Displacement: When the valve disc of the discharge medium is in the fully open state, the discharge volume of the medium measured from the outlet of the valve per unit time is called the displacement of the valve. Daily maintenance of the heating system of the heat-conducting oil boiler, diesel combustion engine, fuel oil, gas oil furnace 1. Remove the burner to check whether the nozzle, diffuser, atomization device, fan-shaped hole structure is deformed 2. Whether the ignition rod spacing is appropriate, whether there is Dirty and deformed kerosene furnace 1. Whether the grate slices are burned, the coal loading machine, the slag machine, the blower, the induced draft machine are operating normally 2. Whether the glass surface of the flame detector is stained affects the observation of the light oil of the heat conduction oil furnace Maintenance of the automatic control system of the burner 1. Check whether the machine is loose or damaged due to overheating; 　　 2. Whether the terminals are discolored, rusted, or attached to dirt; 　　 3. Whether the sound and light display of various instruments and meters are normal　　4. Whether the various start and stop buttons and structures are normal, reflecting whether they are sensitive; 　　5, whether the instructions of the pressure gauge, thermometer, and flowmeter are normal and accurate; 　　6, whether each action is normal.　　Daily maintenance of the heat-conducting oil boiler diesel burner　　The maintenance and inspection steps of the electric heating heat-conducting oil boiler diesel burner: 　　一、Maintenance and maintenance of the heat-conducting oil heater 　　1. Clean the oil filter regularly.　　2. Keep the photosensitive electric eye clean.　　 3. Water should be drained at regular intervals to drain the water and dirt accumulated on the bottom of the fuel tank.　　4. Clean the inside of the burner at regular intervals.　　5. The temperature near the burner should not be too high, otherwise it will affect the normal operation or cause damage to the burner parts, especially the damage to the control box.　　 6. The vicinity of the burner should be kept clean, and no flammable debris should be placed.　　 7. Unstable voltage will damage some components of the burner.　　 8. Avoid the burner from being splashed with water.　　2. Maintenance of the heating surface of the main body　　1. Maintenance methods for the heating surface of the boiler diesel burner body for a long time: there are dry and wet methods. If the furnace is stopped for more than one month, the dry maintenance method should be adopted, and the wet maintenance method can be used for the furnace shutdown for less than one month.　　 (1) Dry maintenance method: 　　 After the boiler diesel burner is shut down, drain the boiler water to completely remove the internal dirt and rinse it. Dry it on a low fire in the furnace (be careful not to use a large fire), and then install the 10-30 mm block of quicklime in separate plates and place it in the drum so that the quicklime does not contact the metal. The weight of the quicklime is determined by the drum The volume is calculated at 8kg per cubic meter, and then all manholes, hand holes, and pipeline valves are closed and checked every three months. If the quicklime is broken into powder, it must be replaced immediately. When the boiler diesel burner is running again, the quicklime and Remove the disk. (2) Wet maintenance method: After the boiler diesel burner is shut down, let the boiler water cool to below 70℃, drain the boiler water, thoroughly remove the internal dirt, flush it, all manholes, hand holes, pipeline valves, etc. are tightly closed , And use a blind plate to completely isolate the boiler diesel burner in operation. Then re-inject the treated soft water to the lowest safe water level of the boiler diesel burner, and then inject the prepared alkaline solution into the boiler diesel burner. Its composition is: sodium hydroxide (caustic soda), 8-10kg per ton of boiler water If you choose sodium carbonate (soda ash), add 20kg per ton of boiler water, or add 20kg per ton of boiler water. After all the alkaline solution is added, soft water is injected into the boiler diesel burner until the water emerges from the highest part of the boiler diesel burner. After closing the water supply valve, pay attention to mixing the alkaline solution in the boiler diesel burner evenly. During the maintenance period, the furnace should be slightly fired regularly and the water should be circulated regularly to make the concentration of the alkaline solution consistent. Take an alkaline solution for testing every five days. If the alkalinity is less than 5-12mmol/1, add a solution. Do not use wet maintenance in cold climates to prevent the boiler water from freezing and damaging the diesel burner of the boiler.　　3. Maintenance of other auxiliary machines　　1. Clean the filter 1-3 in the oil (gas) circuit every month.　　2. Clean the furnace, flue pipe and flue 1-2 times a year.　　 3. Regularly lubricate the motor and water pump bearings.　　4. Regularly tighten the flue and machine bolts. 4. Inspection of oil boiler diesel burner 1. According to the 'Steam (Hot Water) Boiler Diesel Burner Safety Technical Supervision Regulations', the boiler diesel burner should be inspected internally and externally if one of the following conditions exists And hydraulic test.　　 (1) After new installation, modification and relocation.　　 (2) When the operation has been stopped for more than one year and the operation needs to be resumed.　　 (3) After major repairs of pressure components.　　 (4) According to the operating conditions of the boiler diesel combustion engine, when there is doubt about the equipment status, it is necessary to conduct an inspection.　　 2. Before the inspection, the boiler diesel burner should be completely shut down to completely remove the scale and soot. When necessary, the outer packaging and insulation materials of the furnace wall must be removed. The key points of the internal inspection are as follows: 　　 (1) The defective part was inspected last time.　　 (2) The inner and outer surfaces of the pressure components of the boiler diesel burner, especially the openings, welds, etc., should be inspected for cracks, cracks and corrosion.　　 (3) Whether the pipe wall is worn or corroded.　　 (4) Whether there are cracks, fractures and corrosion in the tension of the boiler diesel burner and the joints of the tensioned components.　　 (5) Whether the pressure component has dents, bends, bulges and overheating.　　 (6) Whether there is corrosion at the contact point between the drum (boiler) and the brick lining. 　　 (7) Whether there is scale or slag on the water side of the pressure element.　　 (8) Whether there are corrosion or cracks at the interface between the water inlet pipe and the sewage pipe and the drum (shell), and whether the connection part of the sewage valve and the sewage pipe is firm.　　3. The focus of the external inspection is: 　　 (1) Whether the various systems in the boiler diesel combustion engine room are complete, and whether the boiler workers and water quality testers are specially certified.　　 (2) Whether the safety passage around the boiler diesel combustion engine is unblocked, and whether the pressure components, pipes and valves are deformed or leaked in the boiler diesel combustion engine room.　　 (3) Whether the three major safety accessories are sensitive and reliable, whether the water level gauge, safety valve, pressure gauge, etc. are blocked with the main body of the boiler diesel burner.　　 (4) Whether the actions of various safety protection devices are sensitive and reliable.　　 (5) Whether the auxiliary equipment of the boiler diesel burner is operating normally.　　 (6) Whether the water treatment equipment of the boiler diesel combustion engine is operating normally, and whether the water quality test indicators meet the standard requirements.　　4. After the inspection is completed, a hydraulic test shall be carried out according to the requirements of this manual.　　Safety operating rules for the light oil burner of the heat-conducting oil furnace 　　1. Preparations before ignition: 　　1. Clean up the debris in the furnace.　　2, the pressure gauge and the thermometer work normally.　　3. There is no leakage at each valve, and the motor runs normally.　　4. The circulation pipeline is unobstructed.　　2. Ignition temperature rise: 　　1. Turn on the circulating pump to circulate the heat and oil.　　 2. The ignition and heating process of the heat-conducting oil furnace light oil burner must follow the principle of 'one slow and two stops'. Once it is slow, the heating speed is slow. The second stop is to stop heating in the two temperature ranges of 95°-110° and 210°-230°, and maintain this temperature for a period of time.　　3. After the cold furnace is ignited, control the heating rate at 10°/hour until 90°—95°. Because of the high viscosity of the oil when the furnace is cold, the flow velocity in the tube on the heating surface is low, the oil film on the tube wall is thick, and the heat transfer conditions are poor. If the temperature rises too fast, the temperature of the local oil film is likely to be too high. 4. Precautions during ignition temperature rise: 　　 (1) When the heat carrier temperature rises above 200°, a comprehensive inspection of the equipment and the entire system should be carried out, and all bolt connections should be thermally tightened to eliminate the uneven thermal expansion. The leak.　　 (2) Pay attention to the expansion of the heat transfer oil. If the expansion is too large, open the drain pipe and put the heat transfer oil into the oil storage tank to prevent the heat transfer oil from overflowing from the expansion tank and cause accidents.　　 (3) For cold furnace ignition, the circulation pump must be turned on before ignition. 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