CN205222834U - A device for hot house rainwater purifies - Google Patents

Abstract

The utility model discloses a device for purifying rainwater in plastic greenhouses, which belongs to the technical field of facility agricultural engineering. Ancillary equipment specially designed for rainwater purification in plastic greenhouses. The rainwater collection and purification device includes a rainwater collection tank on a slope, a square purification tank, a water storage tank and a circular rainwater reuse pipe. It flows into the purification pool through the filters with successively smaller apertures installed in the rainwater collection tank installed on the slope. The purification tank basically meets the needs of crop irrigation after the two-step filtration and sedimentation of the gravel layer and the artificial soil layer. The bottom of the purification tank is connected to the water storage tank, and the connection is filtered through a polypropylene hollow ultrafiltration membrane to meet the water needs of some domestic water and special crops. The utility model has strong pertinence, low cost, is simple and easy to implement, and can meet the needs of production; effectively improves the utilization efficiency of rainwater, land and agricultural waste resources; fully protects the ecological environment, and organically combines the development of modern agriculture and ecological construction .

Description

A device for rainwater purification in plastic greenhouses

1 Technical field:

The utility model relates to a device for collecting, purifying and reusing rainwater in plastic greenhouses, in particular to a double purification system of primary filtration and fine filtration and a reusing system. It belongs to the technical field of modern facility agricultural engineering.

2 background technology:

my country's per capita water resources are scarce, and agricultural water consumption accounts for a large part of fresh water resources utilization. Rainwater recycling within the scope of plastic greenhouses is of great significance to improving the efficiency of agricultural water use. The rainwater collected directly contains more impurities. Direct irrigation is not conducive to the growth of greenhouse crops and the health of the human body. The existing patents focus on the purification of rainwater for housing construction. At present, there is no rainwater purification system designed according to the surrounding environment of plastic greenhouses. .

3 Contents of the invention:

The purpose of the utility model is to collect and preliminarily purify the rainwater within the scope of the plastic greenhouse to meet the standard of water for crop irrigation in view of the deficiencies in the prior art of rainwater collection and purification in plastic greenhouses. This design combines plastic greenhouses with rainwater collection and rainwater purification to achieve the dual benefits of agricultural water use and agricultural resources. (1) Through the arched plastic film of the plastic greenhouse, the rainwater during rainfall is collected in the rain collecting trough around the shed, which is simple and efficient. (2) Utilize the combination of precipitation primary filtration and biological fine filtration to achieve a good rainwater purification effect and meet the water demand for crop growth. (3) Adapt measures to local conditions, effectively use the shape of plastic greenhouses to collect rainwater and agricultural waste for rainwater filtration, save agricultural resources, and provide new ideas for recycling agricultural rainwater. The utility model is a new way of relying on agricultural facilities and serving agricultural irrigation, which is beneficial to the development of rainwater collection and reuse in arid and semi-arid areas.

Technical solution: a device for collecting and purifying rainwater in plastic greenhouses. It is characterized in that: the utility model provides a rainwater collection and reuse device, which includes a rainwater collection tank, a primary filter tank, a purification tank, a water storage tank and a rainwater reuse system. Collecting, filtering and reusing irrigation become a whole, and together serve the collection and utilization of rainwater in plastic greenhouses.

The rainwater collection tank is set around the greenhouse to collect the rainwater collected during the rainfall and part of the rainwater inflow from the ground. The initial filter pipe has three filter meshes with decreasing mesh sizes in order to be able to filter the larger rainwater. Impurities are intercepted and filtered.

The purification pond is the part that mainly implements rainwater purification. First, the rainwater filtered through the primary filtration pipeline passes through the gravel layer for precipitation, and the smaller impurities that are not filtered out by the primary filtration are further removed through precipitation. Then there is the artificial soil layer under the gravel layer. After the purification of the artificial soil layer, it can effectively filter and purify the heavy metals and pollutants in the rainwater. After the artificial soil layer is filtered, the rainwater can basically meet the requirements of crop irrigation. .

The further improvement of the utility model is that the above-mentioned rainwater purification system also includes an ultrafiltration filtration system, and the function of the ultrafiltration system is to effectively filter out bacteria, colloids, suspended solids, and macromolecular organic matter in the water to meet the needs of livestock and special crops. need.

The rainwater recovery and purification device also includes a water pump and a water pipe for rainwater reuse, and the upper part of the water pipe is located in the shed so as to utilize purified clean rainwater.

Compared with the prior art, the beneficial effects of the utility model are reflected in:

(1) Rainwater is collected by setting water tanks around plastic greenhouses, which improves the utilization efficiency of rainwater and plays an effective demonstration role in the conservation and efficient use of water resources in the arid and semi-arid areas of Northwest China. (2) Rainwater is mainly used for agricultural irrigation. The purification process is simple, the cost is low and the purification effect is remarkable. It can achieve the purpose of rainwater reuse and is easy to promote in production practice. At the same time, it can also meet some of the water needs of industry and life. (3) Adapt measures to local conditions, turn waste into treasure, and use agricultural waste and biological purification methods to purify rainwater, which not only improves the utilization efficiency of agricultural resources, but also reduces environmental pollution, providing supply for modern agricultural development and ecological environment restoration. Suggestions for reference. (4) The main part of the rainwater purification system is underground, which saves land and improves the efficiency of land use.

4. Description of drawings:

Figure 1: Schematic diagram of a device for rainwater purification in plastic greenhouses 1

Numbers in the picture: 1. plastic greenhouse foundation, 2. rainwater collection tank, 3. primary filter, 4. secondary filter, 5. tertiary filter, 6. gravel layer, 7. artificial soil layer, 8. Polypropylene hollow ultrafiltration membrane, 9. reservoir, 10. circulation pump and circulation pipe.

5. Specific implementation methods:

The rainwater collection and purification process of plastic greenhouses in this example is shown in the figure, including five parts: rainwater collection tank, primary filter tank, purification tank, water storage tank and rainwater reuse system.

Foundation 1 is the basic construction of the greenhouse. The rainwater collection tank is No. 2 in the figure. The tank is 20cm away from the edge of the foundation. The tank depth and section width are 20cm and 30cm respectively. It mainly collects rainwater from the plastic greenhouse surface and surrounding areas. The collected rainwater flows through the primary filter tank, which is 50cm wide and has three filter screens, allowing the rainwater to flow through the primary filter screen ³ with a grid size of 5cm2 and the secondary filter screen with a grid size of ^3cm2 . The filter screen 4 and the three-stage filter screen 5 with a mesh size of 1 cm ² are regularly cleaned of impurities intercepted before each stage of the filter screen.

The tail end of the primary filter tank leads to the top of the fine filter tank. The volume of the fine filter tank is a cube of 1*1*1m, the upper part is provided with a gravel layer 6, the thickness of the gravel layer is 15cm, and the particle size of the gravel is 1-1.5cm. An artificial soil layer 7 is arranged under it, and the artificial soil layer is formed by mixing discarded matrix and slag, with a thickness of 30 cm. Heavy metals and some harmful microorganisms in rainwater are precipitated and filtered through 6, 7.

The bottom of the purification tank is connected to the top of the water storage tank 9, and the connection is provided with a polypropylene hollow ultrafiltration membrane 8, through which bacteria, colloids, suspended solids, and macromolecular organic matter in the water can be effectively filtered out. The water storage tank is a cuboid cement pit with a size of 3*2*2, and the bottom end is connected with the water system in the greenhouse through a circulating pump and a circulating pipe 10 in turn.

In summary, the utility model has designed above-mentioned invention.

Claims (6)

1. A device for rainwater purification in plastic greenhouses, characterized in that: a rainwater collection, purification and reuse integrated system device specially designed for plastic greenhouses, consisting of rainwater collection tanks, primary filter tanks, purification tanks, and water storage tanks It is composed of a rainwater reuse system. The rainwater collection tank is 20cm away from the edge of the foundation, and the groove depth and section width are 20cm and 30cm respectively. It mainly collects rainwater from the surface of the plastic greenhouse and the surrounding area; The pool width is 50cm, and there are three filters, allowing rainwater to flow through the primary filter with a mesh size of ^5cm2 , the secondary filter with a mesh size of ^3cm2 and the third stage with a mesh size of ^1cm2 The filter screen, the impurities intercepted before each stage of the filter screen are cleaned regularly; the end of the primary filter screen leads to the top of the fine filter pool, the volume of the fine filter pool is a cube of 1*1*1m, the upper part is provided with a gravel layer, and the thickness of the gravel layer is 15cm, the particle size of the gravel is 1-1.5cm, and an artificial soil layer is set under it. The artificial soil layer is made of waste matrix and slag, and the thickness is 30cm. The polypropylene hollow ultrafiltration membrane can effectively filter out bacteria, colloids, suspended solids, and macromolecular organic matter in the water through the membrane. The water storage tank is a cuboid cement pit with a size of 3*2*2, and the bottom end passes through the circulating pump and the circulating pipe in turn. (10) Connected to the water system in the greenhouse. 2. A device for rainwater purification in plastic greenhouses according to claim 1, characterized in that: the rainwater collection tank is located around the foundation of the greenhouse, connected with the primary filter tank, the primary filter tank is wider than the rainwater collection tank, and has 3 levels Filters of different sizes. 3. A device for rainwater purification in plastic greenhouses according to claim 1, characterized in that: the purification pool consists of a hollow ultrafiltration membrane, an artificial soil layer and a gravel layer from bottom to top, and the hollow ultrafiltration membrane is located in the purification between the pool and the reservoir. 4. A device for rainwater purification in plastic greenhouses according to claim 3, characterized in that: the gravel layer is paved with stones of uniform size to act as impurities in the deposited rainwater, and the artificial soil is mixed with waste matrix and slag It acts as a biological filter and further purification, and the gravel layer is separated from the artificial soil layer by 30cm. 5. A device for purifying rainwater in plastic greenhouses according to claim 3, characterized in that: the hollow ultrafiltration membrane is a hollow fiber material, and materials with different pores are used to purify rainwater according to different needs. Frequency and age of material Clean or replace material on a regular basis. 6. A device for purifying rainwater in plastic greenhouses according to claim 1, characterized in that there is a rainwater reuse system at the bottom of the storage tank, including a water pump and water pipes, and the upper part of the water pipes communicates with the water outlet system in the shed.