阅读说明：本技术 一种生物质密集烤房排放大气污染物的检测方法 (Detection method for atmospheric pollutants discharged from biomass bulk curing barn ) 是由 王军伟 郑志云 常剑 胡保文 杨继周 吕永忠 徐益群 赵文军 孙蒙猛 宛祥 王正 于 2019-06-18 设计创作，主要内容包括：本发明公开了一种生物质密集烤房排放大气污染物的检测方法,涉及通过烘烤过程中实时监测,测定生物质密集烤房烟叶烘烤过程中大气污染物排放的种类和总量,属于空气质量监测技术领域。它是在烘烤过程中依据烘烤曲线不同温度段设点,多次实时监测,克服烟叶烘烤过程中排放的大气污染物使用物料衡算办法计算的不准确性和室外实时在线监测难度大等局限性,减少不符合行业标准的生物质颗粒的使用,降低有害气体大量排放,促进烟叶烘烤节能减排、提质增效、减工降本和烟草行业绿色长效发展。(The invention discloses a method for detecting atmospheric pollutants discharged by a biomass bulk curing barn, relates to the determination of the types and the total amount of the atmospheric pollutants discharged by tobacco leaves in the curing process of the biomass bulk curing barn through real-time monitoring in the curing process, and belongs to the technical field of air quality monitoring. The method is characterized in that the real-time monitoring is carried out for multiple times according to different temperature section set points of a baking curve in the baking process, the limitations that the calculation inaccuracy of the atmospheric pollutants discharged in the tobacco baking process by using a material balance method is high, the difficulty of outdoor real-time online monitoring is high and the like are overcome, the use of biomass particles which do not meet the industrial standard is reduced, the large amount of harmful gas is reduced, and the energy conservation and emission reduction, the quality improvement and efficiency improvement, the labor reduction and cost reduction of the tobacco baking process and the green long-term development of the tobacco.)

1. A detection method for atmospheric pollutants discharged by a biomass bulk curing barn is characterized by comprising the following steps: and (3) determining the types and the total amount of the atmospheric pollutants discharged in the tobacco leaf baking process of the biomass bulk curing barn through real-time monitoring in the baking process.

2. The method for detecting the atmospheric pollutants discharged by the biomass bulk curing barn according to claim 1, wherein the method comprises the following steps: the detection method comprises the steps of monitoring in real time for multiple times according to different temperature section set points of a baking curve in the baking process, and calculating the total pollutant emission amount in the whole baking process.

3. The method for detecting the atmospheric pollutants discharged by the biomass bulk curing barn according to claim 1, wherein the method comprises the following steps: the pollutant detection comprises the following steps:

step 1, implementation method: the metal head of the cigarette gun extends into the smoke outlet, the handle of the cigarette gun is fixed on the frame, the arrangement of the collecting device is completed, and the detection equipment (smoke analyzer) can be directly placed on a platform right below the smoke outlet and connected through a hose;

step 2, acquiring frequency: setting points at each temperature section of 33 ℃, 36 ℃, 38 ℃, 42 ℃, 46 ℃, 50 ℃, 54 ℃ in the color fixing period, 60 ℃ and 66 ℃ in the tendon drying period, measuring each temperature section for one hour after the temperature rise is stable and before the next temperature section is about to rise, and monitoring the concentration and the flow rate of the atmospheric pollutant emission in the two hours;

and 3, calculating the total amount of the atmospheric pollutants: according to the following formula, the total pollutant emission amount of different temperature stages in the whole tobacco curing process is calculated by combining related parameters; emission amount (KG) = M emission concentration (mg/M) of pollutant M³) X heating or temperature stabilization time length (h) x flow velocity (m)³/h）×10^-6。

Technical Field

The invention relates to the field of air quality detection, in particular to a method for detecting atmospheric pollutants discharged by a biomass bulk curing barn.

Background

The baking is taken as a key link on a tobacco leaf production chain, the final quality and the availability of the tobacco leaves are determined, and the baking fuel is an important factor for determining the cost, energy conservation and emission reduction of the tobacco leaves. The biomass particles used as the baking fuel are complicated in source, and include tobacco stems, corn stalks, soybean stalks, rice hulls, peanut shells, corncobs, oil tea shells, cottonseed hulls, bamboos, wood chips and the like. In order to enable air pollutants discharged in the tobacco leaf baking process as the bulk curing barn baking fuel, namely biomass particles, to meet the requirements of 'notice of technical specification (trial) of a biomass particle forming fuel burner of a printing bulk curing barn by China tobacco general company', the emission of a large amount of harmful gases is reduced, and the energy conservation and emission reduction, the quality improvement and efficiency improvement, the reduction of labor and cost and the green and long-term development of the tobacco industry are promoted.

At present, few researches are carried out on monitoring the emission of atmospheric pollutants in the tobacco leaf baking process of a biomass bulk curing barn, and the total amount of the pollutants emitted in the existing researches is calculated by a material balance method of the atmospheric pollutants emitted by burning of fuels of an environmental protection department. Because the tobacco leaf baking process is stage-by-stage temperature rise, the combustion sufficiency degree of each stage in the combustion process is different, and the total amount of air pollutant emission in the baking process is calculated by a material balance method is inaccurate. Meanwhile, the time for baking is long, and the time for baking tobacco leaves in each furnace is 7-10 days, so that outdoor real-time online monitoring of air pollutants is difficult to realize.

The same public reports as the invention are not found at home and abroad through literature search.

Disclosure of Invention

The invention aims to overcome the limitations that the calculation inaccuracy of the atmospheric pollutants discharged in the tobacco leaf baking process by using a material balance method and the outdoor real-time on-line monitoring difficulty are high, and the types and the total amount of the atmospheric pollutants discharged in the tobacco leaf baking process of a biomass bulk curing barn are measured by setting points according to different temperature sections of a baking curve in the baking process and carrying out real-time monitoring and calculation for multiple times.

In order to achieve the purpose, the invention is realized by the following technical scheme: and (3) determining the types and the total amount of the atmospheric pollutants discharged in the tobacco leaf baking process of the biomass bulk curing barn through real-time monitoring in the baking process.

Preferably, the detection method comprises the steps of setting points according to different temperature sections of a baking curve in the baking process, monitoring for many times in real time, and calculating the total pollutant emission amount in the whole baking process.

Preferably, the contaminant detection comprises the following steps:

step 1, implementation method: stretch into inside the exhanst gas outlet with the opium pipe metal head, fix the opium pipe handle at the shelf, accomplish collection system's arrangement. The detection equipment (flue gas analyzer) can be directly placed on the platform right below the flue gas outlet and connected through a hose;

step 2, acquiring frequency: setting points at each temperature section of 33 ℃, 36 ℃, 38 ℃, 42 ℃, 46 ℃, 50 ℃, 54 ℃ in the color fixing period, 60 ℃ and 66 ℃ in the tendon drying period, measuring each temperature section for one hour after the temperature rise is stable and before the next temperature section is about to rise, and monitoring the concentration and the flow rate of the atmospheric pollutant emission in the two hours;

and 3, calculating the total amount of the atmospheric pollutants: according to the following formula, the total pollutant emission amount of different temperature stages in the whole tobacco curing process is calculated by combining related parameters; m pollutant discharge (KG) is M discharge concentration (mg/M)³) X heating or temperature stabilization time length (h) x flow velocity (m)³/h) ×10^-6。

The invention has the beneficial effects that:

the invention aims to overcome the limitations that the calculation inaccuracy of the atmospheric pollutants discharged in the tobacco leaf baking process by using a material balance method and the outdoor real-time on-line monitoring difficulty are high, and the types and the total amount of the atmospheric pollutants discharged in the tobacco leaf baking process of a biomass bulk curing barn are measured by setting points according to different temperature sections of a baking curve in the baking process and carrying out real-time monitoring and calculation for multiple times.

Drawings

FIG. 1 is a diagram of contaminant monitoring during baking in a biomass bulk curing barn;

each point in the graph is a monitoring point set for different temperature sections, and the monitoring time of each monitoring point is one hour.

Detailed Description

To better illustrate the present invention, the following examples are provided to further illustrate the present invention by monitoring the type and amount of atmospheric pollutants emitted during the baking of a biomass-dense barn, but are not intended to limit the invention.