阅读说明：本技术 一种低能耗高效原位气提式循环水净化养殖系统 (Low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system ) 是由 朱松明 张乐平 刘刚 张亚东 代明允 叶章颖 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种低能耗高效原位气提式循环水净化养殖系统,该系统包括养殖池、设于养殖池内的生物过滤器以及设于养殖池底部的集污排污装置；所述的生物过滤器内设有填料、曝气头和气提装置；所述曝气头位于生物过滤器底部,其另一端连接有空气泵；所述气提装置包括设于生物过滤器内的气提管以及设于气提管上部的气提出水管,且气提出水管的高度高于养殖池水面。本发明系统兼具气提曝气增氧并带动水体循环流动、环形涡流沉淀集污去除、生物过滤水体净化等综合功能。该系统结构紧凑、占地面积小、可以连续稳定运行,解决了低成本、低耗高效去除污染物净化水质并循环水体的问题,也解决了固体废弃物回收的问题,同时提高了养殖池的空间利用率。(The invention discloses a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification and culture system, which comprises a culture pond, a biological filter arranged in the culture pond and a sewage collecting and discharging device arranged at the bottom of the culture pond; the biological filter is internally provided with a filler, an aeration head and an air stripping device; the aeration head is positioned at the bottom of the biological filter, and the other end of the aeration head is connected with an air pump; the air lifting device comprises an air lifting pipe arranged in the biological filter and an air lifting water outlet pipe arranged at the upper part of the air lifting pipe, and the height of the air lifting water outlet pipe is higher than the water surface of the culture pond. The system has the comprehensive functions of air stripping aeration oxygenation, water body circulation flow driving, annular vortex sedimentation dirt collection removal, biological filtration water body purification and the like. The system has compact structure and small occupied area, can continuously and stably operate, solves the problems of low cost, low consumption, high efficiency, pollutant removal, water purification and water body circulation, also solves the problem of solid waste recovery, and simultaneously improves the space utilization rate of the culture pond.)

1. A low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system is characterized by comprising a culture pond (1), a biological filter (2) arranged in the culture pond (1) and a sewage collecting and discharging device (4) arranged at the bottom of the culture pond (1); a filler (6), an aeration head (7) and an air stripping device are arranged in the biological filter (2); the aeration head (7) is positioned at the bottom of the biological filter (2), and the other end of the aeration head is connected with an air pump (8); the air stripping device comprises an air stripping pipe (9) arranged in the biological filter (2) and an air stripping water outlet pipe (10) arranged at the upper part of the air stripping pipe (9), and the height of the air stripping water outlet pipe (10) is higher than the water surface of the culture pond (1).

2. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the biofilter (2) is fixed at the bottom of the cultivation pond (1) through a support frame (5).

3. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the cultivation pond (1) is circular, and the bottom of the cultivation pond is funnel-shaped; the biological filter (2) is positioned at the center of the culture pond (1) to improve the space utilization rate of the culture pond (1).

4. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 3, wherein the biological filter (2) is cylindrical, and the bottom is in an inverted cone shape; the bottom inclination of the biological filter (2) is not less than that of the culture pond (1).

5. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the biofilter (2) comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, and the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is 2: 1-6: 1; the height of the outer cylindrical hollow cylinder is higher than the water surface height of the culture pond (1), and the height of the inner cylindrical hollow cylinder is lower than the water surface height of the culture pond (1); the bottom of the outer cylindrical hollow cylinder is designed into a filter screen (3), and the side wall of the inner cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed.

6. The low energy consumption and high efficiency in-situ air-lift type circulating water purification cultivation system as claimed in claim 1, wherein the filler (6) is a hydrophilic suspended filler.

7. The low-energy-consumption high-efficiency in-situ air-lift type circulating water purification aquaculture system as claimed in claim 1, wherein the height ratio of the part of the air lift pipe (9) located under water to the part located above water is 3: 1-5: 1, and a tail end water outlet of the air lift water outlet pipe (10) is in an obliquely downward direction so as to facilitate water outlet to drive aquaculture water to form annular vortex.

Technical Field

The invention relates to the technical field of circulating water culture water purification, in particular to a low-energy-consumption and high-efficiency in-situ air-lift type circulating water purification culture system.

Background

The circulating water culture mode becomes the development trend of the aquaculture industry, and after a series of water purification treatments such as physical sedimentation, biological filtration, sterilization and disinfection and the like are carried out on culture wastewater, the pollutant content in a water body can be effectively reduced, and the culture wastewater is recirculated and flows back into a culture pond to realize the recycling of water. The circulating water culture has important effects on reducing the discharge of culture sewage and improving the utilization rate of water resources.

Pollutants in the recirculating aquaculture wastewater mainly come from bait residues, excrement generated by cultured animals, debris and debris shed from organisms and the like, which result in high inorganic nitrogen concentration and low C/N ratio in the water body. The purification of the aquaculture wastewater, including the low-consumption and high-efficiency removal of pollutants such as solid particles, ammonia nitrogen and the like in a water body, is one of the key links in the recirculating aquaculture.

Disclosure of Invention

The invention aims to provide a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification and culture system, which can purify water with low consumption and high efficiency, recycle culture water, strengthen the recovery of solid wastes and improve the space utilization rate of a culture pond. The system can continuously and stably operate, solves the problems of low cost, low consumption, high efficiency, pollutant removal and water quality purification, also solves the problem of solid waste recovery, and simultaneously improves the space utilization rate of the culture pond.

The invention is realized by adopting the following technical scheme:

a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system comprises a culture pond, a biological filter arranged in the culture pond and a sewage collecting and discharging device arranged at the bottom of the culture pond; the biological filter is internally provided with a filler, an aeration head and an air stripping device; the aeration head is positioned at the bottom of the biological filter, and the other end of the aeration head is connected with an air pump; the air lifting device comprises an air lifting pipe arranged in the biological filter and an air lifting water outlet pipe arranged at the upper part of the air lifting pipe, and the height of the air lifting water outlet pipe is higher than the water surface of the culture pond.

In the above technical scheme, further, the biofilter is fixed at the bottom of the culture pond through a support frame.

Furthermore, the culture pond is generally round, and the bottom of the culture pond is funnel-shaped; the biological filter is positioned at the center of the culture pond so as to improve the space utilization rate of the culture pond.

Further, the biological filter is cylindrical, and the bottom of the biological filter is in an inverted cone shape; the bottom inclination of the biological filter is not less than that of the culture pond, so that solid particles can be precipitated and accumulated towards the center of the bottom of the culture pond along with the annular vortex.

Further, the biological filter comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, and the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is 2: 1-6: 1; the height of the outer cylindrical hollow cylinder is higher than the water surface height of the culture pond, and the height of the inner cylindrical hollow cylinder is lower than the water surface height of the culture pond; the bottom of the outer cylindrical hollow cylinder is designed into a filter screen, and the side wall of the inner cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed.

Further, the filler is a hydrophilic suspended filler.

Furthermore, the ratio of the height of the part of the air stripping pipe, which is positioned under water, to the height of the part of the air stripping pipe, which is positioned above water, is 3: 1-5: 1, and a water outlet at the tail end of the air stripping water outlet pipe is in an inclined downward direction, so that the water outlet is facilitated to drive the aquaculture water body to form an annular vortex.

In the invention, the center of each culture pond is provided with the cylindrical biological filter, so that the space utilization rate and the water purification efficiency of the culture pond are improved. The air lifting device is a device which can lift water with low energy consumption and drive the water body to flow, is beneficial to the water body of the culture pond to form a rotating vortex, and can intensively push solid particles in the water body to precipitate and enrich towards the center of the bottom of the pond and enter the sewage collecting and discharging device, and the sewage collecting and discharging device can recover sludge periodically or according to requirements. The aquaculture water is filtered by a filter screen at the bottom of the biological filter, the water quality is purified by internal biological filtration, and the aeration and oxygenation are carried out, then the air is lifted and flows back to the aquaculture pond, so that circulation is realized.

The invention has the following advantages and effects:

1. the invention has the comprehensive functions of air stripping aeration oxygenation, water body circulation flow driving, annular vortex sedimentation dirt collection removal, biological filtration water body purification and the like. The water purifying device is centralized in the center inside the culture pond, occupies a small area, has a compact structure, simple equipment and low economic cost, and improves the space utilization rate of the culture pond.

2. According to the invention, the water purifying device mainly comprising the biological filter is arranged in the center of each culture pond, so that the water purifying efficiency is improved. The biological filter is designed into a coaxial inner and outer cylindrical hollow cylinder shape, so that the contact path of the water body and the filler is prolonged, ammonia nitrogen in water can be removed through full nitrification, the purification effect is further ensured, and the purification efficiency is improved.

3. The invention utilizes the air lifting action to lift the water body and make the water body flow back to the culture pond to form circulation, and can directly utilize the aeration air source without arranging a conventional water pump, thereby achieving the effects of saving electricity and energy.

4. According to the invention, the inclined downward direction of the water outlet at the tail end of the air stripping water outlet pipe is utilized to enable the lifted water body to flow back to the culture pond and form a certain driving force at the same time, so that the water body in the culture pond is driven to slowly rotate to form an annular vortex, and the precipitation and sewage collection recovery is enhanced.

Drawings

FIG. 1 is a schematic view of the cross-sectional structure of the low-energy efficient in-situ air-lift type circulating water purification cultivation system of the present invention.

FIG. 2 is a top view of the low energy consumption high efficiency in situ air stripping type circulating water purification aquaculture system of the present invention.

Detailed Description

Fig. 1 shows a low-energy-consumption high-efficiency in-situ air-lift type circulating water purification culture system, which comprises a culture pond 1, a biological filter 2, an air-lift device (comprising an air-lift pipe 9 and an air-lift water outlet pipe 10) and a sewage and sewage collecting device 4.

The biological filter 2 is fixed inside the culture pond 1 through a support frame 5, and a filler 6 is arranged in the biological filter 2. The air stripping water outlet pipe 10 is connected to the upper part of the air stripping pipe 9, and the aeration head 7 is connected with the air pump 8 and then arranged at the bottom of the air stripping pipe 9. The stripper tube 9 is arranged inside the biological filter 2. The sewage collecting and discharging device 4 is arranged at the central position of the bottom of the culture pond 1.

The culture ponds 1 are generally circular, the bottoms of the culture ponds are funnel-shaped, and a biological filter 2 is arranged at the center of each culture pond 1 to improve the space utilization rate of the culture ponds 1.

Biological filter 2 is the drum formula, and the bottom is the obconic shape, and 2 bottom inclinations of biological filter are not less than the bottom inclination of breeding pond 1 to do benefit to solid particle and deposit the collection along with annular vortex to breeding pond bottom center.

The biological filter 2 comprises an outer cylindrical hollow cylinder and an inner cylindrical hollow cylinder which are coaxially arranged, the diameter ratio of the outer cylindrical hollow cylinder to the inner cylindrical hollow cylinder is preferably 2: 1-6: 1, the height of the outer cylindrical hollow cylinder is higher than the height of the water surface of the culture pond 1, and the height of the inner cylindrical hollow cylinder is lower than the height of the water surface of the culture pond 1; the bottom of the inner and outer cylindrical hollow cylinder is connected together, the bottom of the outer cylindrical hollow cylinder is designed into a filter screen 3, and the side wall of the inner and outer cylindrical hollow cylinder and the bottom of the inner cylindrical hollow cylinder are sealed. The culture water body sequentially completes microfiltration, biological filtration and aeration oxygenation in the biological filter 2.

The filler 6 is hydrophilic suspended filler.

The air-lift water outlet pipe 10 is connected to the upper portion, higher than the water surface of the culture pond 1, of the air-lift pipe 9, the height ratio of the underwater portion of the air-lift pipe 9 to the water surface of the culture pond is preferably 3: 1-5: 1, and a water outlet at the tail end of the air-lift water outlet pipe 10 is in an inclined downward direction so as to facilitate water outlet to drive the culture water body to form annular vortex.

Solid particles in the water body enter the sewage collection and discharge device 4 along with the annular vortex sedimentation and enrichment, and the sewage collection and discharge device 4 recovers sludge periodically or according to the requirement. The culture water is microfiltered by a filter screen 3 at the bottom of the biological filter 2 to remove solid particles, then enters an outer cylindrical hollow cylinder of the biological filter 2, is biologically filtered by a filler 6 from bottom to top and then enters an inner cylindrical hollow cylinder, and the filler 6 is a hydrophilic suspended filler and is an important place for removing ammonia nitrogen by the attachment growth of a biological membrane and the occurrence of nitration reaction. The water in the inner cylindrical hollow cylinder flows through the aeration head 7 for oxygenation and then rises to the air stripping water outlet pipe 10 along the air stripping pipe 9 under the action of air stripping, a water outlet at the tail end of the air stripping water outlet pipe 10 is inclined downwards and tangentially discharged in the horizontal plane, and the water is guided to flow back to the culture pond 1 and simultaneously forms a certain driving force (as shown in figure 2) to drive the water in the culture pond to form an annular vortex, so that the purification and circulation of the circulating water culture water are realized.