CN113009085A

CN113009085A - Movable in-situ gas fumigating device

Info

Publication number: CN113009085A
Application number: CN202110248597.1A
Authority: CN
Inventors: 张巍巍
Original assignee: Shenyang University
Current assignee: Shenyang University
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-06-22

Abstract

A movable in-situ gas fumigating device relates to an in-situ experimental device for fumigating gases such as ozone, carbon dioxide and sulfur dioxide in farmlands, woodlands and grasslands, and comprises a main gas pipe, a gas distribution system, a power system, a control system, universal wheels and a frame (shown in an attached drawing 5). The length of the air distribution pipe can be extended and contracted according to the size of the same sample, and the optimal air distribution is realized at the top end of the canopy. An anemorumbometer is arranged above the main air pipe, and related data is transmitted to a control system in a wired or wireless mode. The device can move in the field in a rotating or reciprocating mode, and the electric quantity of the whole system and the kinetic energy of the movement of the device under the field experiment condition can be provided by solar energy or a storage battery. The invention has the advantages that the field in-situ gas fumigation device can be moved and reused, the gas fumigation position can be flexibly changed, and the field in-situ gas fumigation device is suitable for experiments such as the increase of atmospheric ozone concentration, the increase of carbon dioxide concentration, the settlement of sulfur dioxide and the like.

Description

Movable in-situ gas fumigating device

Technical Field

The invention relates to a movable in-situ gas fumigation device which can be applied to in-situ gas fumigation experiments of ecological systems such as farmlands, forest lands, grasslands and the like, such as gases such as ozone, carbon dioxide, sulfur dioxide, nitrogen oxides and the like.

Background

In the field of global change ecology and research on ecological effects of atmospheric pollution, such as research on the influence of the increase of the concentration of gases such as ozone, carbon dioxide, sulfur dioxide, nitrogen oxides on the overground and underground processes of ecological systems such as farmlands, forests, grasslands and the like, currently adopted experimental devices mainly have forms such as Closed Chambers (CC), Open-Top chambers (OTC), Free air fumigation devices (FACE) and the like. These devices are bulky, fixed in position, immobile and incapable of realizing the reuse of the devices.

Disclosure of Invention

The invention provides a movable in-situ gas fumigation device, which comprises a main gas pipe, a gas distribution system, a power system, a wind speed and direction instrument, a control system, universal wheels and a frame. The gas distribution system comprises a gas cylinder, a mass flow controller and a fan. The gas distribution system for the ozone fumigation experiment also comprises an ozone generator. The flow of the target gas is adjusted by the mass flow controller, and the target gas is mixed with the high-pressure air blown by the fan to prepare gas with a certain concentration and then the gas is introduced into the main gas pipe. A certain number of air distribution pipes are distributed on the main air pipe at certain intervals. The air distribution pipe is made of rigid hard pipe or non-rigid hose, and the connection position of the air distribution pipe and the main air pipe is provided with a valve which can adjust the opening and closing state and the opening degree. The length of the main air pipe is designed and processed according to the size of the same sample. The length of the air distribution pipe is telescopic, so that the air distribution head is positioned at the top end of the canopy, and optimal air distribution is realized. An anemoclinograph is arranged above the main air pipe, relevant data are transmitted to the control system in a wired or wireless mode, and the control system adjusts the flow size and the opening and closing state of each air distribution pipe according to the wind speed and the wind direction so as to realize higher concentration at the upwind position and lower concentration at the downwind position. The device can move in the field in a rotating or reciprocating mode, and the electric quantity of the whole system and the kinetic energy of the device movement are provided by a power system. The device has the advantages that the device can be moved, the flexible change of the gas fumigation position and the recycling of the device can be realized, and the device can be applied to in-situ gas fumigation experiments of ecosystems such as farmlands, woodlands, grasslands and the like, such as gas concentration rise experiments of ozone, carbon dioxide, sulfur dioxide, nitrogen oxides and the like.

Drawings

Fig. 1 is a schematic diagram of a mobile in-situ gas fumigation apparatus of the present invention.

Fig. 2 is a schematic diagram of a gas distribution system of a mobile in-situ gas fumigation apparatus according to the present invention.

Fig. 3 is a schematic diagram of a mobile in-situ gas fumigating device applied to a circular sample plot.

Fig. 4 is a schematic diagram of a mobile in-situ gas fumigating device applied to a rectangular sample chamber.

FIG. 5 is a schematic diagram of a mobile in-situ gas fumigator of the present invention, with multiple sets being used in a rectangular pattern.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The scope of the invention as claimed is not limited to the scope described in the detailed description.

The first embodiment is as follows: the embodiment of the invention provides an implementation method of a movable in-situ gas fumigation device applied to a circular sample plot. As shown in figure 3, for a circle, the gas distribution can be rotated clockwise or counterclockwise by taking the center of the circle as the center. In the air distribution process, the control system receives the wind speed and the wind direction signals and adjusts and controls the opening and closing state and the flow of the air distribution pipe valve in real time, so that the high upwind flow and the low downwind flow are realized.

The second embodiment is as follows: the embodiment of the invention provides an implementation method of a movable in-situ gas fumigation device applied to a rectangular sample plot. As shown in figure 4, the gas distribution can be carried out in a reciprocating manner along one side of the rectangular sample plot. In the air distribution process, the control system receives the wind speed and the wind direction signals and adjusts and controls the opening and closing state and the flow of the air distribution pipe valve in real time, so that the high upwind flow and the low downwind flow are realized. Two or more sets of devices can also be used to achieve uniform distribution of gas in a segmented, zoned, or vertically moving manner in the manner shown in FIG. 5.

Claims

1. A movable in-situ gas fumigation device is characterized by comprising a main gas pipe, a gas distribution system, a power system, a control system, an anemorumbometer, universal wheels and a frame.

2. The device as claimed in claim 1, wherein for field in-situ ozone fumigation, the gas distribution system is composed of an oxygen cylinder, a mass flow controller, an ozone generator and a fan; oxygen enters the ozone generator after passing through the mass flow controller, and generated ozone gas is mixed with high-pressure air blown by the fan and then is input into the main air pipe.

3. The device as claimed in claim 1, wherein for field in-situ fumigation of carbon dioxide, sulfur dioxide and nitrogen oxides, the gas distribution system is composed of a gas cylinder, a mass flow controller and a fan; the target gas passes through the mass flow controller, is mixed with high-pressure air blown by the fan, and is input into the main air pipe.

4. The device as claimed in claim 1, wherein a plurality of air distribution pipes are arranged on the main air pipe at regular intervals, and the connection between the air distribution pipes and the main air pipe is provided with an electromagnetic valve for adjusting the opening and closing state and the opening degree.

5. The device of claim 1, wherein the length of the main air pipe is designed and processed according to the size of the ground, and the length of the air distribution pipe can be adjusted in a telescopic mode according to the height of the vegetation canopy.

6. The device as claimed in claim 1, wherein an anemoclinograph is installed above the main air pipe, the wind speed and wind direction data are transmitted to the control system in a wired or wireless mode, and the control system adjusts the flow rate and the open and close states of each air distribution pipe according to the wind speed and the wind direction, so as to realize higher concentration at the upwind position and lower concentration at the downwind position.

7. The apparatus of claim 1, wherein the power required by the mass flow meter, ozone generator, fan and control system, and the kinetic energy of the movement of the apparatus are provided by a power system (including a solar power storage device).

8. The device as claimed in claim 1, wherein, for a circular sample plot, the device can move the gas distribution in a rotating way by centering on the center of the sample plot circle; the device can perform reciprocating motion and gas distribution along the set direction in a rectangular mode.