Boiler porous pulverized coal sampling gun and design method thereof

Abstract

The invention discloses a boiler porous pulverized coal sampling gun and a design method thereof. A sampling hole is formed in the sampling gun, a conical plug is arranged at the gun head of the sampling gun, and a positioning pointer is arranged on the outer wall of the sampling gun; a sampled pulverized coal pushing device is arranged in the sampling gun; and a pulverized coal leakage preventiondevice is arranged in the sampling hole. Through the implementation of the sampling gun, the problems that the existing single-hole pulverized coal sampling time is long and a rotary sampling systemis complex can be effectively solved. Through a porous pulverized coal sampling pipe, pulverized coal sampling can be performed representatively. The porous pulverized coal sampling pipe is simple andpractical. Pulverized coal sampling operation is simple, sampling is convenient, the sampling position does not need to be calibrated in advance, and pulverized coal sampling representativeness is high. A baffle plate is arranged at the sampling hole of the porous pulverized coal sampling gun, so that pulverized coal in the pipeline can enter the sampling gun by pushing the baffle plate through forward wind pressure. Through the arrangement of a spring, the collected pulverized coal is prevented from reversely flowing out of the sampling gun, and the effect of maintaining the sampling resultis achieved.

Description

technical field [0001] The invention relates to the technical field of boiler pulverized coal sampling, in particular to a pulverized coal sampling gun and a sampling hole design method used for pulverized pipelines with different diameters. Background technique [0002] Controlling the appropriate fineness of pulverized coal is the basic requirement to ensure the safe and stable combustion of pulverized coal boilers. The fineness of pulverized coal affects the safety, economy and environmental protection of pulverized coal boilers. [0003] Coal powder sampling is necessary to measure the fineness of coal powder. Through coal powder sampling, the fineness of coal powder ground by the coal mill and the quality of coal powder entering each burner are determined, and the operating conditions of the pulverization system are supervised, and coal grinding can be carried out. Machine performance diagnosis. [0004] Coal fineness R 90 And its uniformity index n has an important i...

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Problems solved by technology

There are strict requirements on the roundness of the pulverized coal pipeline at the sampling point. The sampling pipe has 4 sampling holes with a diameter of 5mm. According to the diameter of the pulverized coal pipeline, the sampling point position is divided according to the equal ring area method. The head of the sampling gun may deviate from the central axis of the pipeline. Multi-head sampling Due to the sliding and rotating parts of the gun, the sampling head is easy to be damaged, and the system may leak, which affects the accuracy of coal powder sampling, and the system is complicated and the equipment price is high

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