CN-117267506-B - Centralized control and sampling gas diffusing method

CN117267506BCN 117267506 BCN117267506 BCN 117267506BCN-117267506-B

Abstract

The invention discloses a gas diffusing method for centralized control and sampling, relates to the technical field of gas diffusing, and aims to solve the problems of greater potential safety hazard and inconvenient sampling operation of the existing gas diffusing pipe; the invention discloses a centralized diffusing transformation method, which comprises the steps of adding a centralized diffusing pipe, a plurality of scattered diffusing pipes and a bracket fixedly arranged on an operation platform, wherein the lower end of the centralized diffusing pipe is provided with a bottom plate, the bottom plate is provided with through holes the same as the scattered diffusing pipes in number, each through hole is connected with an air outlet at the upper end of one scattered diffusing pipe, the periphery of the centralized diffusing pipe is fixedly provided with a plurality of lifting lugs, each lifting lug is arranged on the bracket, one end of the scattered diffusing pipe, which is far away from the centralized diffusing pipe, is communicated with a main gas pipeline, each scattered diffusing pipe is respectively provided with a partition valve and an analysis sampling device above the operation platform, each partition valve and each analysis sampling device are arranged in a centralized manner, and the centralized diffusing transformation method is easy to fix and firm, is provided with a lightning protection device, and convenient to sample and control.

Inventors

JIN ZHONG
YANG MENG
Ba Chengmin
LIANG HANWEN
WANG SUOJUN

Assignees

中冶华天南京工程技术有限公司
中冶华天工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20231008

Claims (3)

1. The gas diffusing method for centralized control and sampling is characterized by comprising the following specific contents: Removing the original diffusing pipes, namely removing the struggle ropes for fixing the original diffusing pipes from the gas main pipeline operation platform of the original diffusing pipes, and removing the original plurality of diffusing pipes at the top of the gas main pipeline; The centralized diffusing transformation comprises the steps of adding a centralized diffusing pipe (1), a plurality of scattered diffusing pipes (2) and a bracket fixedly arranged on an operation platform, wherein the lower end of the centralized diffusing pipe (1) is provided with a bottom plate (9) which is provided with through holes the same as the scattered diffusing pipes (2) in number, and each through hole is connected with an air outlet at the upper end of one scattered diffusing pipe (2); the periphery of the concentrated dispersing pipe (1) is fixedly provided with a plurality of lifting lugs (7), each lifting lug (7) is erected on a bracket, one end of the scattered dispersing pipe (2) far away from the concentrated dispersing pipe (1) is communicated to a gas main pipeline, each scattered dispersing pipe (2) is respectively provided with a block valve (5) and an analysis sampling device (6) above an operation platform, each block valve (5) and the analysis sampling device (6) are arranged in a concentrated manner, the upper end of a bottom plate (9) is positioned in the concentrated dispersing pipe (1) and is filled with porous materials (8) which are not reacted with gas, the porous materials (8) are used for dispersing and uniformly distributing air flows from different scattered dispersing pipes (2), the porous materials (8) adopt honeycomb-shaped pore plates, or are containers with fluffy iron hydroxide inside, a large number of ventilation holes communicated with the inside and the outside of the containers are uniformly distributed on the surfaces of the containers, the bracket is arranged into a frame shape and surrounds the periphery of the concentrated dispersing pipe (1), the plurality of the block valves (5) and the analysis sampling devices (6) are arranged at least 3, the upper ends of the bottom plate (9) are positioned in the concentrated dispersing pipe (1) and are distributed in a circumference array with the concentrated dispersing pipe (1) by taking the central line of the concentrated dispersing pipe (1) as a shaft, the lifting lugs (7) are only erected on the bracket or welded and fixed with the bracket after being erected, the lifting lugs (7) are provided with a plurality of groups, each group is provided with 4 lifting lugs and is positioned at the same height, the lower end of the height of each group of lifting lugs (7) is provided with a circle of frame for supporting each group of lifting lugs (7), the height interval of the lifting lugs (7) of the adjacent group is 3-5 m, and the modified concentrated diffusing device is fixedly arranged at one corner of the operating platform; The rain-proof lightning protection measures are that the upper end of the concentrated diffusing pipe (1) is fixedly provided with a rain-proof cap (3), a gap is reserved between the concentrated diffusing pipe and the rain-proof cap for air outlet, and the upper end of the rain-proof cap (3) is fixedly provided with a lightning protection device (4); when the isolating valve (5) and the analysis sampling device (6) are required to be operated, the operation is directly and intensively performed beside the bracket on the main gas pipeline operating platform.
2. The centralized control and sampling gas diffusing method according to claim 1 is characterized in that the lightning protection device (4) is welded and fixed with the rain hat (3), and the lightning protection device (4) is connected to a lightning protection grounding grid of the whole plant.
3. The method for gas diffusion through centralized control and sampling according to claim 1, wherein the heights of the isolating valve (5) and the analysis sampling device (6) from the upper end of the operation platform are not more than 2 meters.

Description

Centralized control and sampling gas diffusing method Technical Field The invention relates to the technical field of gas diffusion, in particular to a gas diffusion method for centralized control and sampling. Background In a gas system, a gas diffusing pipe is often arranged due to gas replacement, purging and the like. Because of the toxicity and fire prevention of the coal gas, certain requirements are made on the arrangement of the coal gas diffusing pipe, for example, 7.3.1.2 regulations of the safety regulations of industrial enterprises (GB 6222-2005), the diffusing pipe orifice should be higher than the coal gas pipeline, equipment and walking board by 4m and not less than 10m from the ground. In practical engineering, the pipe diameter of the gas diffusing pipe is smaller, the length of the vertical pipe is longer, and the long-term influence of wind load and the like is easy to cause strength or fatigue damage, so that the gas diffusing pipe is generally fixed by struggle ropes, the structure is simple in fig. 1, the gas diffusing pipe is generally fixedly arranged at the upper end of a gas main pipe positioned on an operation platform, a manual valve and an analysis sampling device are arranged on the pipe, the struggle ropes can be ensured to play a role only when the stress angle of the struggle ropes and the gas diffusing pipe is within a certain range, the bulletin number is CN205136946U, the invention patent named as a concentrated diffusing pipe discloses that three lacing wire plates are uniformly distributed on the outer surface of the diffusing pipe along the circumferential direction, and each lacing wire plate is fixedly connected on the basis through one stay wire. But the site is often limited due to the site, the positions of the diffusing pipes are scattered, the quantity is more, the proper fixing points of struggle ropes are difficult to find, the fixing effect of struggle ropes is affected, and the huge potential safety hazard of dumping of the gas diffusing pipes exists. Meanwhile, the existing gas diffusing device has the following problems: (1) The manual valve and the analysis sampling device are arranged on the gas diffusing pipeline, but the pipe diameter of a main gas pipe is large, an operator is not easy to open and close the valve and sample, a platform is required to be arranged alone for aloft operation, the investment cost is increased, the risk of falling at the high position of the operator is also brought, and potential safety hazards exist; (2) The gas diffusing pipeline is an independent high-rise building, the gas is a combustible medium, potential safety hazards of lightning accidents exist, and the existing gas diffusing pipeline is not easy to set with a lightning protection device. In summary, there is a need for a centralized control and sampling gas bleeding method to address these issues. Disclosure of Invention The invention aims to provide a gas diffusing method for centralized control and sampling, which aims to solve the problems of greater potential safety hazard and inconvenient sampling operation of the existing gas diffusing pipe. In order to achieve the purpose, the invention provides the following technical scheme that the gas diffusing method for centralized control and sampling comprises the following specific contents: Removing the original diffusing pipes, namely removing the struggle ropes for fixing the original diffusing pipes from the gas main pipeline operation platform of the original diffusing pipes, and removing the original plurality of diffusing pipes at the top of the gas main pipeline; the centralized diffusing transformation comprises the steps of adding a centralized diffusing pipe, a plurality of scattered diffusing pipes and a bracket fixedly arranged on an operation platform, wherein the lower end of the centralized diffusing pipe is provided with a bottom plate, the bottom plate is provided with through holes the same as the scattered diffusing pipes in number, each through hole is connected with an air outlet at the upper end of one scattered diffusing pipe, the periphery of the centralized diffusing pipe is fixedly provided with a plurality of lifting lugs, and each lifting lug is erected on the bracket; Rain-proof lightning protection measure: a rain cap is fixedly arranged at the upper end of the concentrated diffusing pipe, a gap is reserved between the concentrated diffusing pipe and the rain cap for air outlet, the upper end of the rain hat is fixedly provided with a lightning protection device; When the isolating valve and the analysis sampling device are required to be operated, the operation is directly and intensively performed beside the bracket on the main gas pipeline operating platform. Preferably, the upper end of the bottom plate is positioned in the concentrated diffusing pipe and is filled with porous materials which do not react with gas, and the porous materials are used for dispersing and uniformly