Water Tube Steam Boiler For Feed Mill

Water Tube Steam Boiler For Feed Mill

(10)What are the common faults of boiler safety valve

When the valve leaks under the normal working pressure of the equipment, the leakage of medium in the disc and seat sealing surface of the boiler safety valve occurs in excess of the permitted degree, and the continuous leakage of the medium will also destroy the hard sealing material. Therefore, when the working medium is a steam safety valve, the sealing performance is considered to be qualified if it is invisible to the naked eye at the outlet end and can not be detected under the specified pressure value.

2, the leakage phenomenon at the joint surface between the upper and lower valve bodies of the valve body joint face leakage, the main causes of this leakage are as follows: a, the bolt tightening force of the joint face is insufficient or the tight deviation, resulting in bad sealing surface of the joint surface. B, the sealing surface of the joint face is not good. B, the sealing surface of the joint surface is not good. The tooth-shaped gasket of the valve body joint surface does not conform to the standard. C, the flatness of the valve body joint surface of the boiler safety valve is too poor or the sealing failure is caused by the hard impurity gasket.

3, the phenomenon that the main safety valve does not operate when the impulse safety valve is actuated is usually referred to as the rejection of the main safety valve. The failure of the main safety valve seriously affects the safe operation of the equipment and may cause serious accidents.

4. The main causes of this failure are as follows: on the one hand, the leakage of steam from the piston chamber of the main safety valve becomes larger or smaller, although the impulse safety valve has returned to the seat. However, there is still a high pressure of steam in the pipeline and piston chamber, and the force to push the piston downward is still great, so the return of the main safety valve is slow. The method to eliminate this fault is mainly solved by the opening of the open throttle valve and the increase of the throttle aperture. Both the opening of the throttle valve and the increase of the throttle aperture cause the steam left in the pulse tube to be discharged rapidly. Thus, the pressure in the piston is reduced, and the pressure in the piston is reduced. The thrust acting on the piston decreases rapidly, and the valve core returns to the seat rapidly under the action of the upward thrust of the steam medium in the header and the upward tension of the spring of the main safety valve itself. On the other hand, too much friction between the moving parts of the main safety valve and the fixed parts will also cause the main safety valve to return slowly. The solution to this problem is to control the clearance between the moving parts of the main safety valve and the fixed parts within the standard range.

5. The low return pressure of the safety valve has great harm to the operation of the boiler. Too low return pressure will result in a large number of media overtime discharge, resulting in unnecessary energy loss.

6. The flutter relief valve of the safety valve is called the flutter of the safety valve, which is called the flutter of the safety valve during the discharge process. The occurrence of the flutter phenomenon is very easy to cause the fatigue of the metal, decrease the mechanical properties of the safety valve, and cause serious equipment hidden trouble. The main causes of vibration are as follows: on the one hand, the improper use of valves, the selection of valve discharge capacity is too large (relative to the required discharge), The elimination method should be to make the rated displacement of the selected valve as close as possible to the required discharge of the equipment. On the other hand, because the diameter of the imported pipe is too small, smaller than the inlet diameter of the valve, or the resistance of the imported pipe is too large, the elimination of the side When the valve is installed, the inlet pipe diameter of the valve is not small or the resistance of the inlet pipe is reduced. It is also a factor that causes valve flutter because the resistance of discharge pipe is too large, which can be solved by reducing the resistance of discharge pipe.

Gas boiler chimney requires users to set up according to their needs for boiler capacity, fuel type, emissions standards and a series of indicators to determine the purchase of the boiler, but also for transportation, installation and commissioning process, from lifting, to installation, to test furnace, which there are many techniques and precautions. If mastered the techniques, according to the Installation Precautions reasonable to avoid wrong operation, it will save a lot of manpower and financial resources to users, more importantly, can improve efficiency, extend the life of the boiler. Chimney is one of the facilities essential to the process of boiler structures, primarily as hot flue gases or smoke emissions from the boiler to provide ventilation effect. Typically in the production of chimneys, choose as a vertical structure, in order to ensure smooth flow of the gas, the intake air into the combustion or the so-called chimney stack effect. Stack height which will directly affect the ability of the flue gas conveyed to the outside environment through a chimney effect. In addition, the use of chimneys at high altitudes pollutant dispersion may impact on the surrounding environment is reduced. Gas boiler chimney to build gas-fired boiler requires a minimum of not less than eight meters chimney, concrete chimney height should be determined in accordance with the relevant environmental impact assessment document approved. When there is a building 200 meters radius around the new boiler room chimney, chimney building should be higher than the maximum temperature of more than 3 meters. This provision is taken from: "Boiler Air Pollutants Emission Standard" GB13271-2014

Textile enterprises to use what is better boiler

It refers to a fiber or textile fiber assembly Multiscale processing technology. Development of textile technology brought us the biggest impact is our clothes. Textile technology type variety, the laundry production process is also different. But regardless of dyeing, drying, tabletting, sizing, dyeing, shaping and other processes are inseparable from the support and cooperation of steam. Therefore, most textile enterprises will choose to use steam boilers, textile production processes to ensure normal.

Car accessories types of complex processing, such as the interior wall Peng, floor, seats, instrument panels, sound systems, many processes required in a high temperature environment, the temperature becomes optional metrics wind Visteon hot water boiler. It is reported that Dongfeng Visteon existing boiler equipment can not reach the growing production needs, the introduction of fast boiler production of two parties often piezoelectric hot water boiler (CWDR1.8-95 / 70-II) in 2017.

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