CN108835001B - A kind of aquaculture pond system with gas swirling sewage collection - Google Patents

Abstract

The invention relates to a culture pond system for collecting sewage by gas rotational flow.A water inlet aeration plug flow system comprises a guide cylinder, wherein a baffle is fixedly arranged on the inner wall of the guide cylinder through a support frame, a group of aeration heads are arranged behind the baffle along the water inlet direction, and the group of aeration heads are connected with a Roots blower positioned outside the guide cylinder through a gas pipe; the water outlet of the guide cylinder is tangentially arranged along the side wall of the circular culture pond body; the upper drainage system comprises a triangular overflow weir; the triangular overflow weir is positioned at the upper part of the periphery of the circular culture pond body, and a circle of water collecting channel is arranged at the position of the circular culture pond body below the triangular overflow weir; the sewage collection pit of the bottom sewage discharge system is positioned at the lowest part of the center of the bottom of the circular culture pond body, and the fish blocking net is horizontally placed on the sewage collection pit. The invention improves the collection efficiency of excrement and residual bait in the high-density fish pond and reduces the pollution load of the fish pond; the water inlet power is stable, the stability of the water flow in the culture pond is high, the turbulent flow phenomenon can not occur, and the growth of the fish in the water is facilitated.

Description

A kind of aquaculture pond system with gas swirling sewage collection

technical field

The invention relates to a culturing pond system, in particular, to a culturing pond system for collecting sewage by gas whirl.

Background technique

The pond racetrack micro-flow water ecological aquaculture model has developed rapidly in Jiangsu, Zhejiang, Anhui, Guangdong, Shandong and other places in my country in recent years. At the water end, the air-lifting push-flow device is used to push the water body into the flow tank, flow through the breeding area, and flow out from the terminal sewage collection area. During this process, the residual feed and feces of the aquaculture animals are taken away by the water flow and collected to the terminal sewage collection area. This mode has the characteristics of land saving, energy saving, high efficiency and emission reduction.

But there are the following problems:

1) Due to the low sewage suction efficiency of the sewage suction device, the fish feces cannot be discharged from the pool in time and return to the water body, causing serious pollution to the aquaculture water body;

2) The fish are concentrated in the oxygen-enhancing area in the front section, and the density is high, which causes serious friction between the fish, easy to cause skin damage, frequent diseases, and brings greater risks to breeding;

3) The air-lifting push-flow device directly acts on the breeding pond, the water flow in the breeding pond is relatively low in stability, and it is easy to cause turbulent flow, which has an adverse effect on the growth of fish;

4) The drainage is unstable, resulting in poor water quality or waste of water resources.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a culturing pond system for gas swirling sewage collection, which can improve the collection efficiency of feces and residual bait in high-density fish ponds, reduce the pollution load of fish ponds, improve the uniformity of fish distribution in the ponds, and improve the stability of water flow. performance and drainage stability.

The present invention adopts following technical scheme:

A culturing pond system for gas swirling sewage collection, comprising a circular culturing pond body 1, a water inlet aeration push-flow system 2, an upper drainage system 3, and a bottom sewage system 4; the bottom of the circular culturing pond body 1 is The surrounding is inclined towards the central sewage collection pit; the water inlet aeration push flow system 2 includes a guide tube 201, and a baffle plate 205 is fixedly arranged on the inner wall of the guide tube 201 through a support frame 206, and the baffle plate 205 is arranged at the rear of the water inlet direction. There is a group of aeration heads 204, and a group of aeration heads 204 are connected with the Roots blower 202 located outside the guide tube through the air pipe 203; ; Described upper drainage system 3 comprises triangular overflow weir 301; Described triangular overflow weir 301 is located in the upper part around the circular culture pond body 1, the triangular overflow weir 301 position is provided with an escape net 302, the circular culture pond body 1. A ring of water collecting canals 303 is arranged at the position below the triangular overflow weir 301, and the side of the collecting canal 303 is connected with the upper water drainage pipe 304; Support rod 404; the sewage collection pit is located at the lowest center of the bottom of the circular culture pond body 1, the support rod 404 is vertically connected with the fish trap 403, the fish trap 403 is placed horizontally on the sewage collection pit 401, and has a gap with the side wall of the sewage collection pit , the gap is smaller than the size of the fish body passing through, and the gap between the fishing net 403 and the sewage collection pit 401 is adjusted through the support rod 404 .

Further, the area of the fishing net 403 is twice the area of the sewage collecting pit, and the feces and residual bait swirling to the bottom of the pool can pass through the fishing separating net and sink into the lower sewage collecting pit 401 . Since the area of the fishing net is twice the area of the sewage collection pit, it can effectively prevent the feces and residual bait collected by the swirling sewage to the bottom of the pool, which will be broken and damaged by the swimming and stirring of the fish, and will float into the water body for the second time, resulting in secondary pollution. disadvantages.

Further, the fishing net 403 is fixed at the center of the bottom of the pool through the fishing net supporting rod 404 .

Further, the water body of high-concentration suspended particulate matter collected by the swirl is discharged to the outside of the pool from the drain pipe 402 at the bottom of the center of the pool. This part of the water volume only accounts for 5-15% of the total water volume, and the water body flowing out through the upper triangular overflow weir accounts for the total amount of water. 85-95% of the water volume.

Further, the water body flowing out of the triangular overflow weir is collectively discharged to the external ecological purification area or directly reused.

Further, the circular culturing pond body 1 is arranged in the culturing pond, the diameter of the circular culturing pond body 1 is 5-15m, the pond body is made of concrete, stainless steel or glass fiber reinforced plastic, and the bottom of the pond is inclined to the central sewage collection pit, collecting The sump is 1-2m in diameter and located at the lowest point in the center of the bottom of the pool.

Further, the upper mouth of the triangular overflow weir 301 is 0.1-0.15m wide and 0.1m high, and is evenly arranged along the circular culture tank body 1. The number of triangular overflow weirs can meet the maximum water exchange volume of 2 times, and the triangular overflow weir It is evenly distributed along the circular culture pond body 1, and the upper part of the triangular overflow weir 301 also has a 20cm pond body part.

A kind of cultivating pond system for the above-mentioned gas swirling sewage collection, when the system is running, the aeration fan 202 transports air into the gas pipe 202 and then ejects it through the aeration head 204, pushing the surrounding water to flow forward along the guide tube, and from the guide tube. The outlet of the flow cylinder flows out along the tangential direction of the pool wall, which drives the water body of the entire pond to swirl to collect sewage. The baffle 205 is arranged inside the guide cylinder to prevent the backflow of the water body. The baffle 205 is sealed and fixed on the inner wall of the guide cylinder 201, and its area occupies the diversion cylinder. 60% of the cross-sectional area of 201, and the spare cross-sectional area is reserved for the water inlet;

The beneficial effects of the present invention are:

1) Improve the collection efficiency of feces and residual bait in high-density fish ponds and reduce the pollution load of fish ponds;

2) The inside of the circular pool is uniform circulation, and the fish are evenly distributed in the circular pool, which reduces the problem of skin friction and damage to each other and frequent diseases caused by excessive concentration of fish in the runway pool;

3) The circular culture pond is designed with water inflow and oxygenation device, and the inflow water is driven by aeration to form a swirling flow inside the pond body, which drives the rotation of the water body at the bottom of the pond body, and the centrifugal force generated will spread the feces at the bottom of the pond. And the residual bait is collected into the sewage collection tank under the protective cover; while it has the effect of aeration and oxygenation, it is not directly aerated in the tank, the water inlet power is stable, the water flow in the breeding tank is more stable, and there will be no turbulence. The phenomenon of flow is conducive to the growth of fish in the water;

4) The upper and lower drainage is synchronized, and the drainage stability is high, which will not cause poor water quality or waste of water resources.

5) The dirt is transported to the outside of the fish pond through the pipeline to realize the removal of fish excrement and residual bait. A swirling sewage collecting device is installed at the bottom of the middle of the pond body, and a sewage collecting tank is set under the swirl sewage collecting device. A protective cover is installed at the top, and the dirt collection device operates through a swirling flow, with high reliability.

6) Since the area of the fishing net is twice the area of the sewage collection pit, it can effectively avoid the feces and residual bait collected by the swirling sewage to the bottom of the tank, which will be broken and damaged by the swimming and stirring of the fish again, and then float into the water body for the second time. The disadvantages of secondary pollution.

Description of drawings

Fig. 1 is a schematic diagram of the composition of a culturing pond system for gas whirlpool sewage collection according to the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1 .

FIG. 3 is a schematic structural diagram of the culturing pond system of the present invention for gas swirling sewage collection.

FIG. 4 is a schematic diagram of a section of the guide tube in FIG. 3 .

FIG. 5 is an enlarged view of the portion of the guide tube in FIG. 3 .

FIG. 6 is a partial enlarged view of FIG. 5 .

Fig. 7 is a cross-sectional view of the central axis of the system structure of the culturing pond system for gas swirling fouling collection according to the present invention.

FIG. 8 is a partial enlarged view of FIG. 7 .

In the figure, 1. Circular breeding tank, 2. Inlet aeration push-flow system, 3. Upper drainage system, 4. Bottom sewage system, 201. Drain tube, 202. Roots blower, 203. Air pipe, 204. Aeration head, 205. Baffle plate, 206. Support frame, 207. Blocking net, 301. Triangular overflow weir, 302. Anti-escape net, 303. Collection channel, 401. Sewage collection pit, 402. Discharge pipe, 403 . Fishing nets, 404. Support rods.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

In traditional aquaculture ponds, according to the area of 4-6% of the water surface area of the pond, a high-efficiency sewage collection circular culture pond system is constructed, and the water depth is not less than 2.0m, which is used for high-density intensive fish farming, and the rest of the pond area is used as water purification area. The discharge water of the high-efficiency sewage collection circular aquaculture pond system is purified by the water purification zone and returned to the circular pond for reuse to realize the internal circulation of the water body.

The culture pond system includes a circular culture pond body 1, a water inlet aeration push-flow system 2, an upper drainage system 3, and a bottom sewage system 4; The water inlet aeration push-flow system 2 includes a guide tube 201. A baffle plate 205 is fixedly arranged on the inner wall of the guide tube 201 through a support frame 206. The group aeration head 204 is connected with the Roots blower 202 located outside the guide tube through the air pipe 203; the water outlet of the guide tube 201 is arranged tangentially along the side wall of the circular culture pond body 1; the upper drainage system 3 includes Triangular overflow weir 301; the triangular overflow weir 301 is located at the upper part around the circular culture pool 1, the position of the triangular overflow weir 301 is provided with an escape net 302, and the circular culture pool 1 is located below the triangular overflow weir 301 A circle of water collecting canals 303 is set at the position of the water collecting canal 303, and the side of the water collecting canal 303 is connected with the upper water drainage pipe 304; the bottom sewage system 4 includes a sewage collecting pit 401, a discharge pipe 402, a fishing net 403, and a support rod 404; the sewage collecting pit is located in The bottom center of the circular cultivating pond body 1 is the lowest, the support rod 404 is vertically connected with the fishing net 403, and the fishing net 403 is placed horizontally on the sewage collecting pit 401, and has a gap with the side wall of the sewage collecting pit, and the gap is smaller than the fish body passing through. size, the gap between the fishing net 403 and the sump 401 is adjusted through the support rod 404 .

In this embodiment, the area of the fishing net 403 is twice the area of the sewage collecting pit, and the feces and residual bait swirling to the bottom of the pool can pass through the fishing separating net and sink into the lower sewage collecting pit 401 .

In this embodiment, the fishing net 403 is fixed at the center of the bottom of the pool by the fishing net support rod 404 .

In this embodiment, the water body of high-concentration suspended particulate matter collected by the swirling flow is discharged from the drain pipe 402 at the bottom of the center of the pool to the outside of the pool, and this part of the water only accounts for 5-15% of the total water volume. Water bodies account for 85-95% of the total water volume.

In this embodiment, the water body flowing out of the triangular overflow weir is collectively discharged to an external ecological purification area or directly reused.

In this embodiment, the upper mouth of the triangular overflow weir 301 is 0.1-0.15m wide and 0.1m high, and is evenly arranged along the circular culture tank body 1 . The overflow weirs are evenly distributed along the circular culture tank body 1, and the upper part of the triangular overflow weir 301 has a 20cm tank body part.

In this embodiment, the culture pond body is placed in a traditional culture pond, the diameter of the culture pond body 1 can be 10m, the pond body is made of materials such as concrete, stainless steel or glass fiber reinforced plastic, and the bottom of the pond is inclined toward the central sewage collection pit. The diameter of the sewage pit is about 1-2m and is located at the lowest point in the center of the bottom of the pool.

When the system is running, the aeration Roots blower 202 transports air into the aeration pipe 202 and then ejects it through the aeration pipe 204, pushing the surrounding water to flow forward along the diversion cylinder, and flow out tangentially along the pool wall from the outlet of the diversion cylinder, Drive the entire pond water body to swirl to collect sewage. Drainage and sewage use separate discharge systems for upper water and lower sewage. Lower sewage system: With the rotation of the water flow, the water body rich in feces and residual bait collected in the middle of the bottom of the tank can be collected into the sewage collection pit in the center of the bottom of the tank. 402 is discharged to the outside of the tank for separate treatment, and this part of the high-concentration manure and residual bait water body accounts for about 5-10% of the discharged water body. At the same time, the upper part of the sewage collecting pit 401 is a fishing net 403, and its area is about twice the area of the sewage collecting pit. The feces and residual bait that swirl to the bottom of the pool can pass through the fishing net and sink into the lower sewage collecting pit 401. The area of the fish net is twice the area of the sewage collection pit, which can effectively avoid the feces and residual bait collected to the bottom of the pool by the swirling flow and then broken and damaged by the swimming and stirring of the fish, and then floated into the water body for the second time, resulting in the disadvantage of secondary pollution. . Upper drainage system: triangular overflow weirs are evenly arranged around the upper part of the pool body, and the triangular overflow weirs are set up, so that the water body can be discharged evenly from the overflow weirs, and the flow state of the whole water body is more stable, which further avoids the centralized discharge of traditional fish ponds from one side of the pool wall. Suspended solids are carried and escaped by the drainage water, and it is difficult to directly use or purify the water. Due to the cyclone collection effect, the concentration of feces and residual bait in this part of the water body is very small, and the water quality is relatively clean, accounting for about 85-95% of the wastewater discharge. It mainly contains a small amount of soluble pollutants such as ammonia nitrogen and nitrate nitrogen. This part of the water enters the pond water purification area, and after the purification and restoration of the pond water purification area, it enters the circular culture pond system through the aeration push-flow device to realize the recycling of the water body. The system can collect more than 60% of suspended solids, greatly improving the collection efficiency of suspended solids in the water body, and can realize the classification, collection and treatment of wastewater and particulate matter in the breeding process, and reduce the pressure of subsequent wastewater treatment.

To sum up, the present invention is the technical means taken for solving the shortcomings or deficiencies existing in the prior art:

1. Aiming at the problem that the collection efficiency of excrement and residual bait is not high in the rectangular runway running water culture pond, a circular swirling pond is designed to collect excrement and residual bait to accelerate the collection of fish excrement and residual bait at the bottom of the pool, thereby solving the problem. It is difficult to collect excrement and residual bait at the bottom of the traditional breeding rectangular runway breeding pond.

2. In view of the common setting of water inlet and aeration sub-pipes in the pool, which results in high energy consumption and the aeration push-flow device is directly placed in the pond for aeration, it is easy to form turbulent flow inside the pond and it is difficult to form a circular water flow problem. The aeration and oxygenation diversion device realizes the pre-mixing of air and water outside the pool, integrates the water intake and aeration, and uses the intake airflow to promote the water flow without additional power consumption to enter the water, thereby saving energy consumption. In addition, tangential water inflow from the pool wall avoids the formation of turbulent flow, and it is easier to form an annular water flow inside the pool body, improving the collection efficiency of suspended solids.

3. Aiming at the problem that the aquaculture effluent and feces are discharged together with the water body in the aquaculture pond, and the subsequent purification treatment and the difficult disposal of solids such as fecal residues, the upper and lower water discharge systems are set up. The water body after the swirling sewage collection in the circular pond body, feces and residual bait are collected to the bottom of the pond. This part of the water body with high pollutant concentration is discharged from the sewage collecting device at the bottom of the pond, accounting for about 5-15% of the total discharged water body, which can be separately discharged. processing, greatly reducing the difficulty of subsequent processing. The clean water body with less feces and residual bait in the upper part flows out from the overflow weir evenly distributed in the upper part of the circular tank, accounting for about 85-95% of the wastewater discharge. As a result, the suspended solids in the upper water body are still easily carried out by the flowing water, and the upper discharge water still contains a lot of suspended solids. The triangular overflow weir is arranged at the water outlet position of the upper part of the pond body evenly distributed along the pond body, so that the water body can flow from the overflow weir Evenly discharged, the entire water flow state is more stable, avoiding the problem of suspended solids being carried away by the drainage water flow caused by the concentrated discharge of traditional fish ponds from one side of the pond wall, and it is difficult to directly clean and use the problem, which greatly improves the water use efficiency.

4. In view of the small area of the fish trapping net plate in the traditional sewage outlet, the fish feces and residual bait deposited on the bottom of the pool by the swirling flow are easily disturbed and damaged by the fish swimming and return to the water body again, causing secondary pollution problems and improving the traditional trapping. The fishing net covers the area, so that the feces and residual bait deposited on the upper part of the fishing net can sink into the sewage outlet in time, and are isolated from the fish, so as to prevent the feces and residual bait from re-suspending into the water body.

The above are the preferred embodiments of the present invention, and those of ordinary skill in the art can also carry out various transformations or improvements on this basis. Without departing from the general concept of the present invention, these transformations or improvements should belong to the claimed protection of the present invention. within the range.

Claims (6)

1. The utility model provides a dirty breed pond system of gaseous whirl collection which characterized in that:

comprises a circular culture tank body (1), a water inlet aeration plug flow system (2), an upper drainage system (3) and a bottom drainage system (4);

the four circumferential directions of the bottom of the circular culture pond body (1) are inclined to the central sewage collection pit;

the water inlet aeration plug-flow system (2) comprises a guide cylinder (201), a baffle (205) is fixedly arranged on the inner wall of the guide cylinder (201) through a support frame (206), a group of aeration heads (204) are arranged behind the baffle (205) along the water inlet direction, and the group of aeration heads (204) are connected with a Roots blower (202) positioned outside the guide cylinder through a gas pipe (203); the water outlet of the guide cylinder (201) is tangentially arranged along the side wall of the circular culture pond body (1);

the upper drainage system (3) comprises a triangular overflow weir (301); the triangular overflow weir (301) is positioned at the upper part of the periphery of the circular culture pond body (1), the triangular overflow weir (301) is provided with an anti-escape net (302), the circular culture pond body (1) is provided with a circle of water collecting channel (303) at the position below the triangular overflow weir (301), and the side part of the water collecting channel (303) is connected with an upper water discharge pipe (304);

the bottom sewage system (4) comprises a sewage collecting pit (401), a discharge pipe (402), a fish blocking net (403) and a support rod (404); the sewage collecting pit is positioned at the lowest part of the center of the bottom of the circular culture pond body (1), the support rod (404) is vertically connected with the fish blocking net (403), the fish blocking net (403) is horizontally placed on the sewage collecting pit (401) and has a gap with the side wall of the sewage collecting pit, the gap is smaller than the size of passing fish bodies, and the gap between the fish blocking net (403) and the sewage collecting pit (401) is adjusted through the support rod (404);

when the system is operated, air conveyed by the Roots blower (202) enters the air conveying pipe (203) and is sprayed out through the aeration head (204), surrounding water flow is pushed to flow forwards along the guide cylinder and flows out from the outlet of the guide cylinder along the tangential direction of the wall of the pool, the water body of the whole pool is driven to swirl and collect dirt, the baffle (205) is arranged in the guide cylinder to prevent the water body from flowing backwards, the baffle (205) is fixed on the inner wall of the guide cylinder (201) in a sealing way, the area of the baffle accounts for 60% of the sectional area of the guide cylinder (201), and the part with the; a barrier net (207) is arranged at the water inlet part of the guide shell to prevent sundries from entering the guide shell (201);

the width of the upper opening of the triangular overflow weir (301) is 0.1-0.15m, the height is 0.1m, the triangular overflow weir is uniformly arranged along the circular culture pond body (1), the number of the triangular overflow weirs (301) can meet the requirement of changing water quantity by 2 times at most, the triangular overflow weirs are uniformly distributed along the circular culture pond body (1), and the upper part of the triangular overflow weir (301) is also provided with a 20cm pond body part.

2. The gas cyclone sewage collection culture pond system of claim 1, wherein: the area of the fish blocking net (403) is 2 times of that of the sewage collecting pit, and excrement and residual bait which are swirled to the bottom of the pool can sink into the lower sewage collecting pit (401) through the fish blocking net.

3. The gas cyclone sewage collection culture pond system of claim 1, wherein: the fish blocking net (403) is fixed in the center of the pool bottom through a fish blocking net support rod (404).

4. The gas cyclone sewage collection culture pond system of claim 1, wherein: the water body of the high-concentration suspended particles collected by the rotational flow is discharged out of the pool from a discharge pipe (402) at the bottom of the center of the pool, the water amount of the water body is only 5-15% of the total water amount, and the water body flowing out of the upper triangular overflow weir accounts for 85-95% of the total water amount.

5. The gas cyclone sewage collection culture pond system of claim 4, wherein: and the water body flowing out of the triangular overflow weir is intensively discharged to an external ecological purification area or directly recycled.

6. The gas cyclone sewage collection culture pond system of claim 1, wherein: the circular culture pond body (1) is arranged in the culture pond, the diameter of the circular culture pond body (1) is 5-15m, the pond body is made of concrete, stainless steel or glass fiber reinforced plastic materials, the periphery of the pond bottom inclines towards a central dirt collection pit, and the diameter of the dirt collection pit is 1-2m and is located at the lowest position of the center of the pond bottom.

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