Municipal sewage gas collection method

Abstract

The invention provides a method for collecting urban sewer gases, comprising: the collecting personnel determine a sampling position by selecting an inspection well; placing a portable ranger over thewell cover, aligning to the well hole, in order to measure the vertical height of the sampling space via laser reflection principle; placing a position device above the well cover to determine actualposition on vertical height of the sampling point; then positing the inlet probe of exporting device to determined sampling point via the positioning device aligning to the well hole; connecting thegas pipe, a dryer and an air extracting pipe; sealing the well hole; starting the air extracting pump to collect the gas sample with the gas collecting device sequentially through the gas pipe, the dryer, the air extracting pump and the outlet of the air extracting pump; reappearing the collecting steps for three or more than three times in order to take the collected gas sample as parallel reference sample for measurement. The invention has the advantages of simple structure, safe and reliable, low cost, obvious representative realized by systemic and scientific collecting methods.

Description

technical field [0001] The invention relates to a collection method of city sewer gas. Background technique [0002] Urban sewers are relatively closed, and under the influence of microorganisms or other factors, it is easy to generate and accumulate flammable or harmful gases, such as: methane, ammonia, hydrogen sulfide, carbon monoxide, carbon dioxide, sulfur dioxide, chlorine or benzene series gases . All kinds of dangerous gases leak out frequently, which can easily lead to explosion accidents when encountering open flames, resulting in the failure of personal safety, damage to the living environment, and even fires. The existing gas collection method for sewer gas is generally operated manually, and the manhole cover of the inspection well needs to be opened. These toxic and harmful gases are likely to damage the health of on-site workers; the existing sewer gas collection method is cumbersome to operate, there is no uniform standard, and there is a lack of system int...

AI Technical Summary

Problems solved by technology

All kinds of dangerous gases are often leaked. When exposed to open flames, it is very easy to cause an explosion accident, resulting in no guarantee of personal safety, damage to the living environment, and may even cause a fire.

The existing gas collection method for sewer gas is generally operated manually, and the manhole cover of the inspection well needs to be opened. These toxic and harmful gases are likely to damage the health of on-site workers; the existing sewer gas collection method is cumbersome to operate, there is no uniform standard, and there is a lack of system integrity, scientificity, integrity and representativeness