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13512222201 Company hotline: 13512222201
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Company Hotline:
13512222201

Contact:
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Telephone:
022-26510325
Fax:
022-26543626
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Address:
No. 9, Xishui West Road, Beichen District, Tianjin
Tianjin Fan Factory-Jin Blower Co., Ltd. (online consultation)

Tianjin Fan Factory-Jin Blower Co., Ltd. (online consultation)

Tianjin Blower Group Co., Ltd.
  • Business model: production and processing
  • Address: No. 9 Xishui West Road, Beichen District, Tianjin
  • Main: Fans, Blower Fans, Centrifugal Fans
Business Hotline: 13512222201
  • Product Details
  • contact details
      Tianjin Fan Factory -Jin Blower Co., Ltd. (online consultation):
      Tianjin fan , Tianjin blower , Tianjin fan
      Enterprise video show broadcast, please click to play
      Video by: Jin Blower Works Group Co., Ltd.





      Tianjin Blower Group Co., Ltd. is a professional manufacturer of various fan designs and manufacturers. The company has engineering and technical personnel, advanced processing equipment, production technology and perfect detection methods and management systems, strong technical force and stable product quality.

      The air volume required for tunnel mechanical ventilation should be calculated based on the reduction of harmful gas concentration in the tunnel to an allowable value within the allowable ventilation time after the train passes through the tunnel, and the piston action between trains should be considered. The allowable concentration of harmful gas is calculated as not more than 30 mg / m3 when hauled by steam locomotive. When using internal combustion engine traction, currently it can be calculated no more than 2 mg / m3. For tunnels in plateau areas, the sensitive effects of harmful gases on the human body should be considered. The allowable time for tunnel ventilation should generally be calculated based on the interval between the exit of this train and the entrance of the next train, but not more than 15 minutes.



      Tianjin Blower Group Co., Ltd. is a professional manufacturer of various fan designs and manufacturers. The company has engineering and technical personnel, advanced processing equipment, production technology and perfect detection methods and management systems, strong technical force and stable product quality.

      Harm of Boiler Blower Noise and Its Prevention

      1. Harm of environmental noise pollution

      The impact and harm of noise on the human body can generally be divided into two aspects: labor protection and environmental protection. The former refers to endangering human health and causing various diseases. The latter refers to disturbing the quiet environment and affecting people's normal work and life. The harm of noise to human health is mainly manifested in: damage to hearing, causing noise-induced deafness; leading to cerebral cortex excitement and balance imbalance, cerebrovascular function damage; damage to the system, causing digestive disorders; interference to people's normal life, rest, language conversation and daily life Work learning, distracting and reducing work efficiency.

      2. Basic principles of noise management

      There are three main factors that contribute to noise pollution: sound sources, media, and receivers. Only when these three exist at the same time can the listener be disturbed. Starting from these three aspects, the purpose of controlling noise can be achieved by reducing the sound source, limiting the transmission of noise, and blocking the reception of noise. In specific noise control technologies, three types of sound absorption, sound insulation, and noise reduction can be used. Measures.

      2.1 sound absorption

      When sound waves are incident on the surface of an object, part of the sound energy is absorbed by the object and converted into other forms of energy, which is called sound absorption. The sound absorption performance of a material is expressed by the absorption coefficient. The larger the sound absorption coefficient, the better the sound absorption performance of the material. The sound absorption performance of a material is related to the material's properties, structure, angle of incidence of sound waves, and frequency of sound waves. The sound absorption mechanism of porous sound absorbing materials is: there are numerous small holes in the material that penetrate through each other. When sound waves are incident on the surface of these materials and then into these small pores, the air movement in the pores is caused to abut The air on the wall of the hole and the surface of the fiber is difficult to move due to friction and viscous motion resistance, so that the sound energy is converted into heat energy and consumed. Therefore, sound-absorbing materials with good performance must be porous, and the holes must be connected with each other, and the through holes must communicate with the outside world so that sound waves can enter the material.

      For example, the sound absorption coefficient of a 10cm-thick ultra-fine glass wool is 0.87 for a 1000 Hz sound wave.

      2.2 Sound insulation

      The method adopted for sound insulation is to close the noise source so that the noise is controlled in a small space. This sound insulation structure is called a sound insulation cover. When the sound wave encounters the shield, due to the change in the characteristic impedance of the interface, part of the incident sound energy is reflected, part is absorbed, and part of the sound energy penetrates the shield and continues to propagate. The sound insulation performance of a material can be expressed by the sound transmission coefficient. The smaller the sound transmission coefficient, the less the sound energy transmitted through, and the better the sound insulation performance of the material. The sound insulation performance of a material is related to the structure and properties of the sound insulation body and the frequency of the incident sound wave.

      2.3 Silence

      Sound reduction is to fix the porous sound-absorbing material on the inner wall of the airflow channel or in a certain way to achieve the purpose of reducing aerodynamic noise. The amount of noise reduction can generally reach 10-50 decibels.

      3. Fan noise management technology

      The noise of the blower and induced draft fan in the boiler room is generally around 90 decibels. Because the temperature of the boiler flue gas being conveyed is as high as 180 ° C, the use of closed sound insulation can cause poor heat dissipation, excessive motor temperature, and even burn the motor. Therefore, in the process, the fan noise reduction and energy saving are combined. Through practice, the comprehensive control plan for energy saving and noise reduction of boiler fans is as follows: keep the process layout of the boiler room unchanged, place blowers and induced draft fans in sound insulation rooms, connect them to the host with ventilation pipes, and place them on the top of the sound insulation room. An air inlet is installed on the top or wall, and a muffler is installed for air intake in the machine room. In the plan layout, place the blower close to the side of the boiler room, the air inlet is on the upwind side, and the motor is placed in the middle of the air flow channel. When the boiler is running, due to the negative pressure generated by the blower in the sound insulation room, a large amount of outdoor fresh air will automatically enter the sound insulation room. First, the heat exchange with the induced draft motor will cool and cool the room, and the indoor temperature will be maintained at about 50 ° C.


      Tianjin Blower Group Co., Ltd. is a professional manufacturer of various fan designs and manufacturers. The company has engineering and technical personnel, advanced processing equipment, production technology and perfect detection methods and management systems, strong technical force and stable product quality.

      It is very easy to improve the operating efficiency of fans. In common stocks, but some users have used some methods, the efficiency of fans has not been substantially improved, which is also very troublesome for users. If you want to improve Efficiency We must first grasp how to judge the efficiency of the use of fans. We will briefly introduce the use of fans based on the methods provided by some users. I believe that it will greatly help users to improve the use efficiency of fan plants.

      At the beginning, in the process of selecting a fan, we have to perform a performance test on the fan so that we can determine whether the efficiency of the fan can meet the requirements for use. During the performance test, determining the efficiency of the fan is at the inlet and outlet pipes of the centrifugal fan. Drill holes one at a time and measure the static pressure at the inlet and outlet of the centrifugal fan. Estimate the operating efficiency of the fan based on the static pressure of the centrifugal fan. This method is easy to operate and does not affect production, but it does require users to have some more professional skills and common sense. In this regard, users can learn systematically before testing, so that they can have a clearer understanding of the fan.

      The situation is different if the fan uses a hydrodynamic coupling. The mechanical loss of the coupling is 5% at the rated speed, and the mechanical loss reaches 28% at 75% of the rated speed. The operating efficiency of the centrifugal fan with a hydraulic coupling speed is much lower. According to the actual use of the user, the original centrifugal fan is transformed to change the aerodynamic performance of the centrifugal fan, so that the centrifugal fan works at high efficiency.

      Generally, the centrifugal fan will be equipped with an adjustable damper. This damper will have a great impact on the efficiency of the fan. If the opening of the damper is less than 95% during operation, the centrifugal fan must be in an inefficient operating state. The damper cannot be fully opened, which will affect two aspects. First, it will cause uneven airflow at the inlet of the centrifugal fan and reduce the aerodynamic performance of the centrifugal fan. Second, there will be pressure loss. Based on a centrifugal fan with a flow rate of 100,000 cubic meters per hour, about 4KW of motor power is required for every 100Pa pressure loss.



      Tianjin Fan Factory -Jin Blower Co., Ltd. is provided by Jin Blower Group Co., Ltd. Tianjin Blower Factory-Jin Blower Co., Ltd. is a new upgrade launched by Jin Blower Group Co., Ltd. (fuzzlinks.com) this year. The above pictures are for reference only, please call the contact number on this page or the picture to obtain a contact : President Mao.

    津鼓风机集团有限责任公司 版权所有 Copyright © 2019 Jin Blower Group Co., Ltd. All rights reserved

    电话:022-26510325 传真:022-26543626 Contact: Mr. Mao 13512222201 Phone: 022-26510325 Fax: 022-26543626

    网站备案号: 津ICP备19001615号-1 Address: No. 9 Xishui West Road, Beichen District , Tianjin

    Main Products: Tianjin Fan, Tianjin Blower, Tianjin Fan

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