Novel grass ditch experimental device
An experimental device, the technology of planting grass ditch, which is applied in the field of experimental devices to control urban surface rainfall runoff pollution, can solve problems such as runoff errors, and achieve the effects of improving control efficiency, increasing contact time, and realizing length changes
Inactive Publication Date: 2016-11-09
TIANJIN UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to provide an experimental device for planting grass ditch to solve the problem that there is a large error between the simulated runoff and the runoff produced by natural rainfall in the prior art, so as to more accurately simulate and study the effect of planting grass ditch on rainfall runoff pollution Control effect
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[0027] Below in conjunction with accompanying drawing, the present invention will be further described:
[0028] Such as figure 1 As shown, the present invention is made up of runoff generating device, water distributing device, flow through device, collecting device four parts.
[0029] The runoff generating device consists of a water tank 1, a dosing tank 2, a solenoid valve A3 and a solenoid valve B6, a variable frequency pump A4 and a variable frequency pump B7, an electromagnetic flowmeter A5 and an electromagnetic flowmeter B8, a tubular static mixer 9, and a control box 10 , and composed of water pipes and wires that act in series. The water tank 1 is made of a plastic drum with a diameter of 1 m and a height of 1 m, and the dosing box 2 is made of a plastic drum with a diameter of 0.5 m and a height of 0.5 m. Water outlet pipes are provided at the bottom of water tank 1 and dosing box 2, and the outlet pipes at the bottom of water tank 1 are connected with solenoid v...
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Abstract
The invention discloses a grass ditch experimental device, which is composed of four parts: a runoff generation apparatus, a water distribution apparatus, a flow-through apparatus and a collection apparatus. The runoff generation apparatus can generate simulated runoff of runoff volume and pollutant concentration along with time change through automatic control of a control box, and improves the similarity of simulated runoff and natural runoff, thus improving the experimental precision. The water distribution apparatus increases the contact time and contact area of runoff and a grass ditch, and avoids short flow phenomenon, thereby improving the reduction and control ability to runoff. The flow-through apparatus is provided with gravel and coarse sand two filter layers to increase its water permeability and simultaneously to improve the reduction ability on runoff pollutants. The collection apparatus can realize automatic collection of outflow runoff for experimental analysis. Different hydraulic loads, pollutant concentrations and different variation rules of the two, the presence or absence of water distribution facilities, length change of water distribution facilities and the like are set to study the influence of the factors on grass ditch runoff reduction control efficiency.
Description
technical field [0001] The invention relates to an experimental device for controlling urban surface rainfall runoff pollution, in particular to an experimental device for planting grass ditches. Background technique [0002] The runoff non-point source pollution caused by urbanization continues to increase, which has become one of the main reasons for the deterioration of water bodies and the destruction of ecological environment at home and abroad. A large amount of untreated surface runoff is rich in a series of pollutants such as nitrogen and phosphorus, especially the initial rainwater runoff, which has a very high concentration of pollutants. These runoffs directly enter the receiving water body through stormwater pipes, which will cause serious deterioration of the water ecological environment in urban areas. . Since the advent of LID (Low Impact Development, low-impact development concept), people have begun to use decentralized source control for rainwater manageme...
Claims
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IPC IPC(8): G01N33/18G01N33/24
CPCG01N33/18G01N33/24
Inventor 田一梅高波
Owner TIANJIN UNIV