How many drainage methods are there? What are the different types of drainage methods in buildings?

You can dig a trench to drain the water, you can use a pump to drain the water, dig a pit at the deepest point of the water and pump it to pump water.

The drainage method, i.e., the method of collecting gases by drainage, is a method of collecting gases in experimental chemistry. It is suitable for collecting all gases that are insoluble in water or do not react with water.

Operation: Fill the gas collection bottle with water first, cover the bottle mouth with a glass sheet, and then stand upside down in the sink. When there are air bubbles at the mouth of the conduit continuously and evenly released, then extend the mouth of the conduit into the gas collection cylinder filled with water, and when you see air bubbles emerging from the outer edge of the gas collection bottle mouth (that is, collect a full bottle of gas), cover the bottle mouth with a glass sheet in the water, move the gas collection cylinder out of the water, and place it on the table or upside down.

1. The downward drainage method is to fill the gas collection bottle with water and buckle it in the sink;

2. The downward and upward drainage method is to fill the gas collection cylinder with water and plug it with a rubber plug with two holes, plug the inlet duct into a little, and extend the water outlet pipe into the bottom of the gas collection cylinder.

1. Compared with the upward emptying method and the downward emptying method, the purity of the collected air is the highest.

2. If two gases are to be mixed in a certain volume, the volume of the collected gas can be roughly controlled by observing the amount of water in the gas collection cylinder. If you mix hydrogen and oxygen 1:4, you can collect some hydrogen first, take it out when there is about 3 4 water left in the bottle, and then collect oxygen until the cylinder is full.

Disadvantages of the drainage method:

The resulting gas is more humid.

External drainage system: refers to the rainwater drainage form in which there is no rainwater bucket on the roof and no rainwater pipe inside the building.

According to whether there is a gutter on the roof.

It can be divided into gutter drainage system and gutter drainage system.

Internal drainage system: refers to a rainwater drainage system with a rainwater bucket on the roof and a rainwater pipe inside the building.

The internal drainage system can be divided into single-bucket drainage system and multi-bucket drainage system, open internal drainage system and closed internal drainage system.

1. Open ditch drainage. Excavate drainage ditches at all levels to form a drainage ditch network, and water enters the water conveyance ditch network (bucket ditch, branch ditch, dry ditch) from the field ditch network (moisture ditch, hair ditch, agricultural ditch), and finally flows into the discharge area (river, lake, sea).

2. Concealed pipe drainage. Buried pipes are buried underground to remove excess water from farmland soil and reduce groundwater levels; In addition to pipelines, there are also trenches of a certain depth, covered with soil or filled with water filtration materials at the bottom of the trenches, and then backfilled.

Called the culvert; There is also a special rat passage plough that penetrates the tubular passage in the soil layer below the field surface to drain water, which is called rat channel drainage.

3. Shaft drainage. Referred to as well drainage, a number of well points are arranged in the drainage area, and well water is pumped through a pump to lower the groundwater level.

4. Biological drainage. The absorption and transpiration of soil moisture by plants are used to lower the groundwater level.

Generally, there are three kinds of engineering practice: gravity drainage, which is a commonly used drainage method; Pressure drainage is to pressurize the water with a pump to reach the full flow state; Vacuum drainage, that is, sucking with a vacuum pump!

Is there a difference between the drainage method and the drainage gas collection method? Hello, I am glad to answer the <> principle for you: the generated gas is passed into the gas collection cylinder filled with water, and the gas is discharged from the gas collection cylinder to achieve the purpose of collecting gas.

Advantages: Purer gas can be obtained. Cons:

Dry gas can not be obtained. Gases that can be collected by the drainage method: gases that are insoluble or insoluble in water and do not undergo chemical reactions in water, such as:

Oxygen (O2), hydrogen (H2), nitrogen (N2), carbon monoxide (CO), methane (CH4), etc. The principle of air exhaust method: according to the difference between the density of gas and air, the air in the gas collector cylinder is discharged by continuously introducing gas into the gas collection cylinder.

To achieve the purpose of gas collection. Advantages: Dry gas can be obtained.

Disadvantages: Purer gases (gas mixtures that are easily collected by air) cannot be obtained. Gases that can be collected by the venting method:

Gases that do not have a chemical reaction with air and have a large difference in density from the density of air, and gases with a density close to the air should not be collected by the air exhaust method. Hope mine can help you <>

Do you have any other questions?