Smoke dust sampling instrument

Abstract

The invention discloses a smoke dust sampling instrument, which comprises a sampling tube and an air extracting pump, wherein the air extracting pump is a membrane pump which comprises a pump body; a working cavity is isolated from the cavity of the pump body via a membrane; air inlet and outlet of the pump are communicated with the working cavity respectively, and are provided with one-way valves respectively; the membrane is provided with a connecting rod which is connected with an output shaft of an electric motor via an eccentric device; and the rotation of the output shaft of the electric motor is converted into reciprocating movement of the membrane. The smoke dust sampling instrument of the invention adopts the membrane pump which has low power and can be supplied with power through a built-in battery, so that the smoke dust sampling instrument has the characteristics of small size, convenient use, high reliability, no hidden trouble of blocking, strong corrosion resistance, capacity for resisting corrosion of smoke dust and damage-free property. The smoke dust sampling instrument of the invention can also save energy, and adopts an integrated sampling tube so that the smoke dust sampling instrument can detect smoke dust and flue gas at the same time.

Description

Technical field [0001] The invention relates to an environmental protection detection equipment, in particular to a low-power soot sampler that can be used in sampling sites. Background technique [0002] Because the environmental pollution caused by industrial boilers, power plant boilers and industrial kilns and other pollution sources is quite serious, countries all over the world have conducted in-depth research and control on this, which requires monitoring of the concentration of particulate smoke emitted by them. Provide decision-making basis for total pollutant control and pollution control. At present, the commonly used monitoring methods include sampling and weighing method, opacity method, light transmission method, laser backscattering method, charge method, β-ray absorption method (in-flue test) and so on. [0003] Among them, the sampling and weighing method is the most widely used now. The basic principle is that a certain volume of dust-containing flue gas passes t...

AI Technical Summary

Problems solved by technology

[0004] The smoke and dust samplers in the prior art all use DC or AC dry rotary vane pumps as the suction power. In order to obtain higher negative pressure and suction volume, the eccentricity of the dry rotary vane pump is made larger, so that the rotary vane rotor The gap between the cylinder liner and the cylinder liner is very small, coupled with the corrosiveness of the high-temperature and high-humidity pollution source gas, the dry rotary vane pump is easy to get stuck, does not work, and has low reliability. It can be said that the fault of the dry rotary vane pump is smoke and dust. The most important failure of the sampler

[0005] The power of the dry rotary vane pump in the prior art is greater than 100W (the flow rate is 50L / min), and it can only work with an AC power supply or an external high-power DC power supply. It is heavy and inconvenient to carry and use.

On a flue sampling platform with a height of several meters to tens of meters and a narrow flue sampling platform, it is necessary to use a junction box to indirectly supply AC power from the work, which has potential safety hazards, and in the flue where the AC power cannot reach, the smoke detection cannot be carried out at all.

[0006] In addition, the soot sampling tube and the flue gas sampling tube of the prior art soot sampler are two separate ones, which is extremely inconvenient to carry and use

[0007] The flue gas flow display device and filter device of the smoke sampler in the prior art are installed on the main body of the smoke sampler, and the water vapor and dust in the flue gas will condense and accumulate in the hose connecting the sampling pipe and the flow display device and filter device , so as to adsorb gaseous pollutants in the flue gas, resulting in inaccurate measurement of gaseous pollutants

[0008] The smoke and dust sampler in the prior art is bulky, heavy and has many accessories, making it inconvenient to carry and use

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