Instructions for the installation and layout of boiler muffler and steam muffler, the nuclear-grade atmospheric release valve muffler is mainly arranged on the roof of the power plant building, in the atmospheric environment, which is used to reduce the noise generated by the final discharge of steam air flow into the atmosphere in the discharge process, reduce the impact of exhaust noise on the environment, and is an important equipment to ensure the working environment of power plant staff. Due to the large airflow velocity, the noise generated is also large, so the noise reduction effect of the muffler is required. In addition, because the medium is water vapor, it is difficult for general resistive mufflers to meet the design requirements.
A kind of atmospheric release valve combined muffler for nuclear power plant comprises a support, a large head, a muffler shell that are installed sequentially from bottom to top, a pipe body is installed on the large head head, a plurality of through holes are formed in the wall body of the pipe body, the upper end of the pipe body extends into the muffler shell, the lower end of the pipe body extends into the support, the pipe body is located in the port of the muffler shell and is encapsulated with a small head, the port where the pipe body is located in the support is provided with an import flange, and the perforated plate with a plurality of through holes is successively installed in the muffler shell from bottom to top.
1. Two 、...... of a multi-well plate with several through-holesA multi-well plate n with several through-holes, and the pore diameter of the through-holes》The pore diameter of through-hole 1》The pore diameter of through-hole 2》......The aperture of the through hole N, and the outlet of the upper air outlet of the muffler shell is provided with an outlet grille.
A kind of combined muffler with atmospheric release valve for nuclear power plant finally achieves the purpose of silencing in the way of "layer by layer silence". The steam flow through a layer of muffler composed of a small head and a pipe body to a multi-layer muffler from bottom to top in the muffler shell, so that the noise is reduced to a reasonable level and the impact on the surrounding environment is minimized. The two lower layers of the muffler shell and the tube body together form the muffling structure of the "throttle and decompression" boiler muffler and steam muffler; The remaining perforated plates, located in the upper position, act as a "small hole injection" exhaust muffler.
As a further setup of the above protocol, the multi-well plates.
1. The second 、...... of the multi-well plateThe perforated plate n is installed in the muffler shell by means of a flange ring. The flange ring is mounted on the inner wall of the muffler housing by means of a reinforcing block. A perforated plate is mounted on each flange ring. The arrangement of the flange ring and the reinforcing block strengthens the rigidity of the muffler shell while ensuring the installation of the perforated plate, and further reduces the sound permeability of the muffler shell, so as to ensure that the noise directly discharged outward through the shell and the superposition of the muffler outlet noise at the receiving point are lower than the controlled noise level. Multi-well plates.
1. The second 、...... of the multi-well plateThe multi-well plates are all detachable and split structure.
The perforated plates of the boiler silencer and steam muffler adopt a detachable split structure to facilitate regular maintenance, and the innovative design of the detachable perforated plate can not only ensure the structural stability under the impact of high-pressure steam flow, but also provide maintainability for the equipment throughout its life. Multi-well plates.
1. The second 、...... of the multi-well plateThe multi-well plates are composed of four quarter-round sector plates of the same size. The upper end face of the straight edge of the sector plate is provided with a connecting block, and the two adjacent sector plates are fixedly connected by a connecting block and a bolt. There is a drainage hole on the large head for draining the stagnant water from the vapor liquefaction inside the muffler. The support is a skirt support. The pipe body is a seamless steel pipe. The combined muffler with atmospheric release valve for nuclear power plant not only has good silencing effect and good structural stability, but also is easy to maintain and has a long service life.
The boiler silencer and the steam silencer are further described below in combination with the accompanying drawings and specific embodiments.
Description of the drawings. Fig. 1 is a schematic diagram of the structure of boiler silencer and steam silencer;
Fig. 2 is a schematic diagram of the enlarged structure of the tube body;
Fig. 3 is a schematic diagram of the structure of a multi-well plate;
Fig. 4 is a schematic diagram of the structure of multi-well plate two;
Fig. 5 is a schematic diagram of the structure of the third perforated plate;
Fig. 6 is a schematic diagram of the structure that flange ring and reinforcing block are installed in the muffler shell;
Figure 7 is a schematic diagram of the structure of four quarter-round sector plates of the same size spliced together to form a multi-well plate.