CN202080984U - Tandem type multi-stage hydraulic drop integrated vertical flow constructed wetland equipment - Google Patents

Abstract

A tandem multi-stage falling water composite vertical flow artificial wetland device, which is structured as a cuboid plate box, composed of wetland device structure, wetland substrate and wetland plants, and consists of 2 groups of the same process lines (No. 1 normal temperature applicable process line and No. 2 Low Temperature Applicable Process Line) in parallel, each group of process lines consists of 6 small grids and a water collection tank; the wetland matrix is divided into four layers, the first layer is the uppermost layer of clay layer, and the second layer of matrix is fine The sand layer, the third matrix is a mixed layer of cinder and limestone, and the fourth matrix is a cobblestone layer. The device has high-efficiency sewage purification function.

Description

Series multi-stage falling water composite vertical flow artificial wetland device

technical field

The utility model relates to environmental engineering technical equipment, in particular to a treatment equipment for rural non-point source polluted wastewater.

Background technique

Rural non-point source pollution has a very significant contribution to the deterioration of the water environment, mainly including fertilizer pollution, pesticide pollution, and livestock and poultry breeding pollution, which are caused by soil particles, nitrogen, phosphorus, pesticides, and other organic or inorganic pollution in farmland caused by soil disturbance. Substances, in the process of rainfall or irrigation, enter the water body in large quantities by means of farmland surface runoff, farmland drainage and underground seepage, or directly cause water body pollution due to arbitrary sewage discharge from the livestock and poultry breeding industry.

Constructed wetlands are artificially created artificial ecosystems that are suitable for the growth of aquatic plants or wet plants and simulated according to natural wetlands. Mainly use the physical, chemical and biological triple coordination of the matrix-microbe-plant complex ecosystem to achieve efficient purification of sewage through filtration, adsorption, co-precipitation, ion exchange, plant absorption and microbial decomposition. At the same time, there are various forms of constructed wetlands. , sewage and different types of wetlands are composed of different configurations, and different types of constructed wetlands have different removal effects on characteristic pollutants and have their own characteristics.

Contents of the invention

The purpose of this utility model is to provide a method for processing high-concentration rural non-point source polluted wastewater, which is poor in purification effect, greatly affected by seasonality, and unstable in water output, in view of the shortcomings of traditional artificial wetland process equipment that directly treats collected high-concentration rural non-point source polluted wastewater. Multiple-stage Series Hydraulic drop Integrated Vertical Flow Constructed Wetland (MSHIVFCW) for source polluted wastewater. After the high-concentration wastewater is treated, the discharged wastewater reaches GB5084-92 "Water Quality Standard for Farmland Irrigation".

The utility model is achieved through the following technical solutions:

The general structure of the device is a cuboid plate box, which is composed of wetland device structure, wetland matrix and wetland plants.

Wetland installation structure:

This device is composed of 2 groups of the same process lines (No. 1 normal temperature applicable process line and No. 2 low temperature applicable process line) connected in parallel. Each set of flow lines consists of 6 small grids and a sump. The 6 small cells of each group of process lines have the same size, and the size of each small cell can be 0.4m×0.5m×1.2m, and every two connected small cells form an upper and lower pool unit (that is, the first and second cells) Two cells form a unit, the third and fourth cells form a unit, and the fifth and sixth cells form a unit), then there are 3 upper and lower pool units, forming 2 units of each unit The box body is connected by a gap in the lower part (it can be 0.15m away from the bottom layer), and every two units are connected by a water drop designed above the substrate. The size of the sump may be 0.1m x 0.5m x 1.2m. The length × width × height of the total board box can be 2.5 m × 1 m × 1.2m.

In order to facilitate the observation of the operating conditions, both sides of the wetland bed are made of transparent glass with a certain strength.

The water inlet of the parallel No. 1 and No. 2 process lines is designed as two independent perforated water distribution pipes for uniform water distribution, and the switch is controlled by a butterfly valve. The water inlet pipes of the two groups of process lines are connected in parallel, and the water inlet pipes of each group pass through the outer wall above the first matrix, and are vertically connected to a perforated water distribution pipe at the end.

In order to increase the oxygen-enriched strength, a water drop with a triangular groove is designed on the upper wall opening of each ascending pool, which is the connection between each unit. In order to ensure that the water flows in the equipment, the opening height of the water drop is sequentially reduced according to the direction of the water flow. To form an elevation difference, a perforated water pipe groove is designed for each water drop.

In order to facilitate the addition of related chemicals, a connecting pipe fixing hole is welded in the middle of the wall of the descending pool of each unit, and a connecting pipe that can lead to the bottom of the tank is installed in the fixing hole. The lower part of the connecting pipe is open and can move up and down.

For the convenience of detection, the sampling tubes for water samples are set at the corresponding positions separated by each layer of matrix.

The outlet water of the third unit enters the sump from the overflow port. An emptying pipe (diameter can be DN20) is installed at the bottom of the sump. Using the principle of siphon, connect a rubber pipe with a water stop clip. Use the rubber pipe and stop The water clip is used to control the internal water level of the device. The entire device is regularly cleaned of sediment and weeds, etc., and the bottom slope of the wetland bed is 3%.

Wetland substrate:

The 6 small grids of this device all use the same kind of matrix, which is divided into four layers of matrix. The first layer, that is, the uppermost layer, is a clay layer. The heights of the clay layers of the three descending pools and the three ascending pools are different. Setting: The height of the clay layer in the first descending pond is 0.6m, the height of the clay layer in the second ascending pond is 0.5m, the height of the clay layer in the third descending pond is 0.4m, the height of the clay layer in the fourth ascending pond is 0.3m, and the height of the clay layer in the fifth descending pond 0.2m, the clay layer height of the sixth ascending pool is 0.1m; the second matrix is a fine sand layer, and the thickness can be 0.1m; the third matrix is a mixed layer of cinder and limestone, and the thickness can be 0.25m; the fourth matrix It is a cobblestone layer with a thickness of 0.15m.

wetland plants:

Wetland plants are planted in the two sets of normal/low temperature process lines of the MSHIVFCW system and the upper and lower tanks of each unit. The two sets of normal/low temperature devices are respectively selected to grow wetland plants suitable for normal and low temperature weather conditions, and each unit The upper and lower pools are determined according to the root length of wetland plants with different treatment effects.

The beneficial effects of the utility model are:

(1) The MSHIVFCW system is an improvement of the IVFCW system. Its wastewater treatment mainly uses the physical, chemical and biological triple coordination of the substrate-microbe-plant complex ecosystem, through multi-stage repeated filtration, adsorption, co-precipitation, and ion exchange. , plant absorption and microbial decomposition to achieve efficient purification of sewage.

(2) Strong replanting ability, large biomass, small footprint, and large equipment processing capacity. The designed MSHIVFCW system, after multi-level drop water re-culture and the matching of different substrate layers and plants with different processing capabilities, fixes a large number of biofilms on the substrate and inhabits more microorganisms with high nutritional levels on it, thereby greatly increasing The pollution load and effluent stability are reduced, and maintenance costs are reduced. At the same time, due to the alternate growth of wetland plant beds with different adaptability to different temperature environments, the drawbacks of traditional artificial wetlands being affected by the weather, resulting in unstable or declining treatment effects, are greatly solved. Therefore, the device has a relatively large and stable treatment capacity.

Description of drawings

Fig. 1 is a front view of the utility model;

Fig. 2 is a top view of the utility model;

In the figure: 1 cobblestone layer 2 cinder and limestone mixed layer 3 fine sand layer 4 clay layer 5 perforated water inlet pipe

6 Wetland plants 7 Water outlet 8 Sampling pipe 9 Connecting pipe 10 Partition board 11 Overflow outlet 12 Water collection tank 13 Siphon drain pipe;

A is the water inlet of No. 1, B is the water outlet of No. 1, C is the water inlet of No. 2, and D is the water outlet of No. 2.

Detailed ways

The collected high-concentration rural non-point source polluted wastewater is treated by the designed MSHIVFCW device. The size of the MSHIVFCW device structure is length×width×height=2.5m×1m×1.2m. After the waste water flows into the device through the water inlet, it will further remove pollutants such as COD, ammonia nitrogen and phosphorus in the waste water after the physical, chemical and biological triple coordinated reactions of the complex ecosystem. After the high-concentration wastewater is treated, the discharged wastewater reaches GB5084-92 "Water Quality Standard for Farmland Irrigation".

The specific implementation process is as follows:

(1) After the rural non-point source polluted wastewater is collected, it can first pass through the interception of the grid to remove the large particles of pollutants and floating objects in the sewage, and then the wastewater enters the MSHIVFCW device.

(2) The waste water enters the water through the perforated water pipe imported by the MSHIVFCW device, and repeatedly passes through the aerobic, anoxic, and anaerobic processes of the upper and lower pools of the device, and cooperates with plant absorption and the action of microorganisms to achieve a good treatment effect in the composite ecosystem .

(3) The effluent treated by the multi-level ecosystem of the device can basically remain stable. At the same time, the treatment effect of targeted wastewater can be increased by adding auxiliary chemicals such as carbon sources into the designed ventilation pipe.

(4) The air pipe designed at the end of the device using the siphon principle can be adjusted up and down, so as to effectively control the height of the sump and wetland bed, and then achieve the purpose of adjusting the water purification effect.

Claims (4)

1. The series-type multi-stage falling water composite vertical flow artificial wetland device is characterized by: (1) The device is structured as a cuboid plate box; (2) The device is formed by parallel connection of 2 sets of the same process lines, that is, No. 1 normal temperature applicable process line and No. 2 low temperature applicable process line. Each group of process lines is composed of 6 small grids and a water collection tank. The 6 cell sizes are the same, and every two connected cells form an upper and lower pool unit, that is, the first and second cells form a unit, the third and fourth cells form a unit, and the first and second cells form a unit. Five and the sixth form a unit, and there are 3 upper and lower tank units in total. The 2 boxes that make up each unit are connected by a gap in the lower part, and every two units are connected by a water drop designed on the top of the substrate; parallel connection The water inlet of No. 1 and No. 2 process lines is 2 independent perforated water distribution pipes to distribute water evenly, and the switch is controlled by a butterfly valve. The water inlet pipes of the two sets of process lines are connected in parallel, and the water inlet pipes of each group pass above the first grid matrix On the outer wall, a perforated water distribution pipe is vertically connected to the end; a water drop with a triangular groove is designed on the upper wall opening of each upward pool, which is the connection between each unit, and a perforated water distribution pipe groove is designed for each water drop ;Weld the connecting pipe fixing hole in the middle of the wall of the descending pool of each unit, and install a connecting pipe that can lead to the bottom of the tank in the fixing hole. The lower part of the connecting pipe is open and can move up and down; The outlet water of the third unit enters the sump from the overflow port, and an emptying pipe is installed at the bottom of the sump, and a rubber tube with a water-stop clip is connected by using the siphon principle; (3) 6 cells of the described device all adopt the same kind of matrix, are divided into four layers of matrix altogether, and the first layer is the clay layer, and the clay layers of three descending pools and three ascending pools have the same height. Not the same, the second layer of matrix is a fine sand layer; the fourth layer of matrix is a cobblestone layer; (4) The two sets of normal/low temperature process lines of the device and the upper and lower pools of each unit are planted with wetland plants. 2. The series-type multi-stage falling water compound vertical flow artificial wetland device according to claim 1, characterized in that: the length×width×height of the plate box of the device is 2.5m×1m×1.2m. 3. The tandem multi-stage falling water compound vertical flow artificial wetland device according to claim 1, characterized in that: the size of the sump is 0.1m×0.5m×1.2m. 4. The tandem multi-stage falling water compound vertical flow constructed wetland device according to claim 1, characterized in that: the four-layer matrix of 6 small grids in the device, the clay layer of the first descending pool in the first layer of matrix The height of the clay layer in the second ascending pond is 0.5m, the height of the clay layer in the third descending pond is 0.4m, the height of the clay layer in the fourth ascending pond is 0.3m, the height of the clay layer in the fifth descending pond is 0.2m, and the clay layer in the sixth ascending pond The height is 0.1m; the second matrix is a fine sand layer with a thickness of 0.1m; the fourth matrix is a cobblestone layer with a thickness of 0.15m. the

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