Biological filter for purifying raft culture water quality

Abstract

The invention discloses a raft-type biological filter for aquaculture water quality purification, and relates to the technical field of water treatment.The raft-type biological filter comprises a biological filter body, an auxiliary mechanism is arranged on the biological filter body and comprises rectangular blocks, an activated carbon layer is placed in one rectangular groove, a gas gathering pipe is arranged at the bottom of each rectangular block, and the activated carbon layer is arranged in the other rectangular groove. Two fan bodies are additionally arranged at the bottom of the inner wall of the middle rectangular groove, a second three-way pipe is communicated between the air outlet ends of the two fan bodies, the air outlet end of the second three-way pipe is communicated with an air distribution pipe, and a pressure release valve is additionally arranged at an inlet in the top of the box cover. According to the aquaculture water purifying device, sulfur-containing compounds, nitrogen-containing compounds, volatile organic compounds, microbial aerogel and other substances which are diffused or volatilized into air in the aquaculture water purifying process can be absorbed and treated, and meanwhile viruses in the microbial aerogel can be killed, so that the environment is protected, and the body health of aquaculture people is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and specifically to a biological filter for purifying the water quality of raft aquaculture. Background Technique

[0002] Raft aquaculture is a mode of aquaculture in which floating rafts are used as carriers in water areas, and aquaculture appliances are suspended for aquaculture. During the process of raft aquaculture, metabolites, residual baits, etc. of cultured organisms such as fish, shrimps, and shellfish continuously enter the water body, so that the water in raft aquaculture contains a large amount of organic pollutants, ammonia nitrogen, microorganisms and other substances. However, in order to prevent water pollutants from affecting the survival and growth of cultured organisms, aquaculture personnel generally use biological filters to purify the water quality of raft aquaculture water to ensure the stability of the aquaculture environment.

[0003] The existing biological filters for purifying the water quality of raft aquaculture have the following deficiencies:

[0004] During the process of purifying the water quality of the existing open-type biological filter for raft aquaculture water purification, sulfur-containing compounds, nitrogen-containing compounds, volatile organic compounds, microbial aerogels and other substances in the aquaculture water will volatilize or emit into the air. At this time, the open-type biological filter cannot treat them, so these substances will be emitted into the environment with the air, polluting the environment and being inhaled by aquaculture personnel, which will also affect the physical health of aquaculture personnel.

[0005] Therefore, we propose a new biological filter for purifying the water quality of raft aquaculture to solve the problems raised in the above background technique. Summary of the Invention

[0006] The purpose of the present invention is to provide a biological filter for purifying the water quality of raft aquaculture. By setting an auxiliary mechanism, sulfur-containing compounds, nitrogen-containing compounds, volatile organic compounds, microbial aerogels and other substances that volatilize or emit into the air during the purification process of aquaculture water can be absorbed and treated, and at the same time, the viruses in the microbial aerogels can be killed, thereby protecting the environment and the physical health of aquaculture personnel, so as to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A biological filter for purifying the water quality of raft aquaculture, including a biological filter body, and an auxiliary mechanism is provided on the biological filter body;

[0008] The auxiliary mechanism includes a rectangular block. At positions near the edge of the bottom of the rectangular block, a plurality of support rods and a plurality of porous air suction pipes are fixed. Three rectangular grooves are preset at the top of the rectangular block. An activated carbon layer is placed inside one of the rectangular grooves. A gas collecting pipe is arranged at the bottom of the rectangular block. A plurality of fixing seats are fixed on the gas collecting pipe. The air outlet end of the gas collecting pipe is communicated with a first three-way pipe. Two fan bodies are additionally installed at the bottom of the inner wall of the middle rectangular groove. A second three-way pipe is communicated between the air outlet ends of the two fan bodies. The air outlet end of the second three-way pipe is communicated with a branch pipe. Two air guide pipes are fixedly penetrated through the inner wall of the other rectangular groove. Check valves are installed at the air outlet ends of the two air guide pipes. A box cover is additionally installed at the top of the rectangular block. A pressure relief valve is additionally installed at the inlet at the top of the box cover.

[0009] Preferably, the plurality of porous air suction pipes and the plurality of support rods are arranged in a relatively staggered manner. The plurality of fixing seats are all installed at the bottom of the rectangular block. Each air inlet end of the gas collecting pipe is respectively communicated with the air outlet end of each porous air suction pipe. The air outlet end of the gas collecting pipe movably penetrates through the bottom of the rectangular block, and the air outlet end of the gas collecting pipe extends into the middle rectangular groove.

[0010] Preferably, the air inlet ends of the two fan bodies are respectively communicated with the two air outlet ends of the first three-way pipe. The air outlet end of the second three-way pipe fixedly penetrates through the inner wall of the middle rectangular groove. The air outlet end of the second three-way pipe extends into one of the rectangular grooves. The branch pipe is located inside one of the rectangular grooves.

[0011] Preferably, the branch pipe is buried in the activated carbon layer. The air inlet ends of the two air guide pipes are both fixedly penetrated through the inner wall of the middle rectangular groove. The air inlet ends of the two air guide pipes are both communicated with the inside of one of the rectangular grooves. The air outlet ports of the two check valves are both close to the bottom of the inner wall of the other rectangular groove.

[0012] Preferably, the biological filter tank body includes two support blocks and a controller. A first treatment tank is fixed between the tops of the two support blocks. The bottom ends of the plurality of support blocks are all slidably embedded in the top of the first treatment tank. The plurality of porous air suction pipes are all located between the rectangular block and the first treatment tank. A second treatment tank is fixed at the bottom of the first treatment tank. The bottom of the second treatment tank and the bottoms of the two support blocks are on the same horizontal plane.

[0013] Preferably, a first electric valve is connected to the liquid outlet end at the bottom of the second treatment tank. Placing plates are fixed on both sides of the second treatment tank, and the two placing plates are respectively fixed to the two support blocks. Two centrifugal pumps and a blower are additionally installed on the top of one of the placing plates. The liquid outlet end of the first electric valve is connected to a connecting pipe, and the liquid outlet end of the connecting pipe movably penetrates through the surface of one of the support blocks. The liquid inlet end of one of the centrifugal pumps is communicated with the liquid outlet end of the connecting pipe, and the liquid inlet end of the other centrifugal pump is communicated with a water inlet pipe.

[0014] Preferably, the liquid outlet end of the other centrifugal pump is communicated with a water outlet pipe, and the water outlet end of the water outlet pipe is communicated with the liquid inlet end at the top of the second treatment tank. A plurality of porous pipes are installed on the outer wall of the second treatment tank near the bottom. The gas outlet ends of the plurality of porous pipes all movably penetrate through the outer wall of the second treatment tank and extend into the second treatment tank. The gas inlet ends of the plurality of porous pipes are all communicated with one-way valves, and the gas inlet ends of the plurality of one-way valves are communicated with a multi-way pipe.

[0015] Preferably, the gas inlet end of the multi-way pipe is communicated with an air outlet pipe. An auxiliary support is fixed on the outer wall of the second treatment tank near the bottom. The air outlet pipe is placed on the auxiliary support. The gas outlet end of the blower is communicated with the gas inlet end of the air outlet pipe. A filter is additionally installed at the gas inlet end of the blower. Second electric valves are additionally installed at the two liquid outlet ends at the bottom of the first treatment tank. The liquid outlet end of one of the second electric valves is communicated with a return pipe.

[0016] Preferably, the liquid outlet end of the return pipe sequentially movably penetrates through the surface of one of the support blocks and the outer wall of the second treatment tank, and the inside of the liquid outlet end of the return pipe is communicated with the inside of the second treatment tank. The liquid outlet end of one of the centrifugal pumps is communicated with a diversion pipe. The input end of the diversion pipe is fixedly penetrated through the top of the inner wall of the first treatment tank. A shunt is arranged at the top of the first treatment tank. The liquid inlet end of the shunt is communicated with the liquid outlet end of the diversion pipe.

[0017] Preferably, a stabilizing seat is fixedly sleeved on each branch of the shunt, and a plurality of stabilizing seats are additionally installed on the top of the first treatment tank. A filter layer is arranged inside the first treatment tank. The diversion pipe is buried inside the filter layer. A safety valve is additionally installed at the gas outlet end near the top of the surface of the second treatment tank. A plurality of auxiliary rings are additionally installed near the top of the surface of the rectangular block. A plurality of hanging rings are additionally installed on the upper side of the box cover. The shunt is located between a plurality of porous suction pipes and the first treatment tank.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The present invention can absorb and treat substances such as sulfur compounds, nitrogen compounds, volatile organic compounds, and microbial aerogels that are emitted or volatilized into the air during the purification process of aquaculture water by setting up an auxiliary mechanism. At the same time, it can also kill the viruses in the microbial aerogel, thus protecting the environment and the health of aquaculture farmers. When the biological filter is performing microbial film formation and subsequent treatment, at this time, by using the cooperation of the controller, the blower body, the first three-way pipe, the air collecting pipe, and the porous air suction pipe, the air containing the substances volatilized or emitted from the aquaculture water entering the second treatment tank can be pumped away.

[0020] 2. Subsequently, the present invention can evenly transport the air carrying substances delivered over to the activated carbon layer by using the cooperation of the second three-way pipe and the air distribution pipe, that is, use the activated carbon to adsorb and treat the substances carried in the air. Then, by using the cooperation of the air guide pipe and the check valve, the air preliminarily treated can be transported to the disinfection water inside another rectangular tank, that is, use the disinfection water to kill the viruses carried in the air. At the same time, by using the cooperation of the pressure relief valve, the excess gas inside the other rectangular tank can be discharged into the environment.

[0021] 3. The present invention can purify the raft aquaculture water by setting up a biological filter body, thus ensuring the survival and growth of cementum organisms. When it is necessary to form a biological film on the surface of the filter material on the filtration layer, at this time, by using the cooperation of the controller, another centrifugal pump, the water inlet pipe, and the water outlet pipe, the aquaculture water delivered by the water supply pipe can be transported into the second treatment tank. Subsequently, by using the cooperation of the controller, the blower, the filter disc, the air outlet pipe, the multi-way pipe, a plurality of one-way valves, and a plurality of porous pipes, the microbial inoculant and the aquaculture water can be fully mixed, and at the same time, the microbial inoculant can obtain sufficient oxygen.

[0022] 4. Then, the present invention can make the aquaculture water mixed with the microbial inoculant inside the second treatment tank circulate by using the cooperation of the controller, one of the centrifugal pumps, the opened first electric valve, the connecting pipe, the diversion pipe, the shunt, the opened one of the second electric valves, the return pipe, and the second treatment tank, that is, make a biological film form on the surface of the filter material on the filtration layer. When the biological film on the surface of the filter material on the filtration layer is complete, at this time, by using the cooperation of the controller, the opened another second electric valve, two centrifugal pumps, the filtration layer, and the opened first electric valve, the raft aquaculture water can be filtered by the filtration layer and then discharged back into the raft aquaculture system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the main view three-dimensional structure diagram of the biological filter for purifying the water quality of raft aquaculture of the present invention;

[0024] Figure 2 is the side view three-dimensional structure diagram of the biological filter for purifying the water quality of raft aquaculture of the present invention;

[0025] Figure 3 This is a partial perspective view from the top-down angle of the biological filter for raft aquaculture water purification of the present invention;

[0026] Figure 4 This is another partial perspective view of the biological filter for raft aquaculture water purification of the present invention;

[0027] Figure 5 This is a partial sectional perspective view from the top-down angle of the auxiliary mechanism of the biological filter for raft aquaculture water purification of the present invention;

[0028] Figure 6 This is a partial sectional perspective view from the side view angle of the biological filter for raft aquaculture water purification of the present invention;

[0029] Figure 7 This is a perspective view of the diverter of the biological filter for raft aquaculture water purification of the present invention;

[0030] Figure 8 This is a partial sectional perspective view from the bottom-up angle of the auxiliary mechanism of the biological filter for raft aquaculture water purification of the present invention;

[0031] Figure 9 This is the Figure 6 enlarged perspective view of the structure at position A of the biological filter for raft aquaculture water purification of the present invention;

[0032] Figure 10 This is a schematic perspective view of the three-dimensional structure of the porous pipe and the check valve of the biological filter for raft aquaculture water purification of the present invention.

[0033] In the figure: 1. Biological filter body; 101. Support block; 102. First treatment tank; 103. Second treatment tank; 104. First electric valve; 105. Centrifugal pump; 106. Connecting pipe; 107. Water inlet pipe; 108. Water outlet pipe; 109. Porous pipe; 110. Multi-way pipe; 111. Air outlet pipe; 112. Auxiliary frame; 113. Blower; 114. Filter sheet; 115. Second electric valve; 116. Return pipe; 117. Controller; 118. Check valve; 119. Diversion pipe; 120. Diverter; 121. Stabilizing seat; 122. Filter layer; 123. Placing plate; 124. Safety valve; 2. Auxiliary mechanism; 201. Rectangular block; 202. Support rod; 203. Porous air suction pipe; 204. Rectangular groove; 205. Activated carbon layer; 206. Gas collecting pipe; 207. Fixed seat; 208. First three-way pipe; 209. Fan body; 210. Second three-way pipe; 211. Air distribution pipe; 212. Guide pipe; 213. Check valve; 214. Box cover; 215. Pressure relief valve; 3. Auxiliary ring; 4. Hanging ring. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: Please refer to Figures 1 - 4 , Figure 6 , Figure 7 , Figure 9 and Figure 10As shown in the figure, the present invention provides a technical solution: a biological filter for purifying water quality in raft aquaculture, including a biological filter body 1, an auxiliary mechanism 2 is provided on the biological filter body 1. The biological filter body 1 includes two support blocks 101 and a controller 117. A first treatment tank 102 is fixed between the tops of the two support blocks 101. The bottom ends of the plurality of support blocks 101 are all slidably embedded in the top of the first treatment tank 102. A second treatment tank 103 is fixed to the bottom of the first treatment tank 102. The bottom of the second treatment tank 103 and the bottoms of the two support blocks 101 are on the same horizontal plane. The liquid outlet end of the bottom of the second treatment tank 103 is connected to a first electric valve 104. Placement plates 123 are fixed to both sides of the second treatment tank 103, and the two placement plates 123 are respectively fixed to the two support blocks 101. Two centrifugal pumps 105 and a blower 113 are additionally installed on the top of one of the placement plates 123. The liquid outlet end of the first electric valve 104 is connected to a connecting pipe 106. The liquid outlet end of the connecting pipe 106 movably penetrates the surface of one of the support blocks 101. The liquid inlet end of one of the centrifugal pumps 105 is connected to the liquid outlet end of the connecting pipe 106. The liquid inlet end of the other centrifugal pump 105 is connected to a water inlet pipe 107. The liquid outlet end of the other centrifugal pump 105 is connected to a water outlet pipe 108. The water outlet end of the water outlet pipe 108 is connected to the top water inlet end of the second treatment tank 103. A plurality of porous pipes 109 are installed on the outer wall of the second treatment tank 103 near the bottom. The gas outlet ends of the plurality of porous pipes 109 all movably penetrate the outer wall of the second treatment tank 103 and extend into the interior of the second treatment tank 103. The gas inlet ends of the plurality of porous pipes 109 are all connected to one-way valves 118. A multi-way pipe 110 is connected between the gas inlet ends of the plurality of one-way valves 118. The gas inlet end of the multi-way pipe 110 is connected to an air outlet pipe 111. An auxiliary frame 112 is fixed to the outer wall of the second treatment tank 103 near the bottom. The air outlet pipe 111 is placed on the auxiliary frame 112. The air outlet end of the blower 113 is connected to the air inlet end of the air outlet pipe 111. A filter disc 114 is additionally installed at the air inlet end of the blower 113. Second electric valves 115 are additionally installed at the two liquid outlet ends of the bottom of the first treatment tank 102. The liquid outlet end of one of the second electric valves 115 is connected to a return pipe 116. The liquid outlet end of the return pipe 116 sequentially movably penetrates the surface of one of the support blocks 101 and the outer wall of the second treatment tank 103. The inside of the liquid outlet end of the return pipe 116 is connected to the inside of the second treatment tank 103. The liquid outlet end of one of the centrifugal pumps 105 is connected to a diversion pipe 119. The input end of the diversion pipe 119 is fixedly penetrated through the top inner wall of the first treatment tank 102. A diverter 120 is provided on the top of the first treatment tank 102. The liquid inlet end of the diverter 120 is connected to the liquid outlet end of the diversion pipe 119. Each branch of the diverter 120 is fixedly sleeved with a stabilizing seat 121. A plurality of stabilizing seats 121 are all additionally installed on the top of the first treatment tank 102. A filter layer 122 is provided inside the first treatment tank 102. The diversion pipe 119 is buried inside the filter layer 122.A safety valve 124 is installed at the air outlet end near the top position on the surface of the second processing box 103.

[0036] In this embodiment, when it is necessary to allow microorganisms to adhere to the surface of the filter layer 122, first, the controller 117 is used to start another centrifugal pump 105. The started centrifugal pump 105 will cooperate with the water inlet pipe 107 to transport the aquaculture water conveyed by the water supply pipe into the interior of the water outlet pipe 108, and then into the interior of the second treatment tank 103. At this time, the aquaculture water entering the interior of the second treatment tank 103 will be mixed with the microbial inoculum. When an appropriate amount of aquaculture water is injected into the interior of the second treatment tank 103, the controller 117 is used to pause another centrifugal pump 105. Subsequently, the blower 113 is started. The started blower 113 will cooperate with the filter disc 114 to filter and then inhale the air in the environment, and then transport it into the interior of the air outlet pipe 111, then into the interior of the multi-way pipe 110, and then be shunted and transported into the interior of each one-way valve 118, and then into the interior of the corresponding porous pipe 109, and then all be transported into the interior of the second treatment tank 103. When gas is continuously injected into the interior of the second treatment tank 103, under the agitation of the gas, the microbial inoculum will be fully mixed with the aquaculture water, and at the same time, the microbial inoculum will obtain sufficient oxygen. When the microbial inoculum and the aquaculture water are fully mixed for a period of time, the controller 117 is used to pause the blower 113. Subsequently, the first electric valve 104, one of the second electric valves 115, and one of the centrifugal pumps 105 are opened. The started centrifugal pump 105 will cooperate with the opened first electric valve 104 and the connecting pipe 106 to pump away the aquaculture water carrying the microbial inoculum, and then transport it into the interior of the diversion pipe 119, then into the interior of the diverter 120, and then evenly disperse it on the filter layer 122. Then, the filtered aquaculture water will enter the interior of the return pipe 116 through one of the opened second electric valves 115, and then return to the interior of the second treatment tank 103 for a new cycle. In this way, the microorganisms can gradually adhere to the filter media surface of the filter layer 122 to form a biofilm. When a biofilm is formed on the filter media surface of the filter layer 122, the controller 117 is used to close one of the second electric valves 115. Subsequently, the other second electric valve 115 is opened, and before opening, a delivery pipe (for transporting the preliminarily treated water back to the raft aquaculture system) is connected to the water outlet end of the other second electric valve 115. Then, the aquaculture water in the second treatment tank 103 is pumped out again, filtered by the filter layer 122, and then transported back to the raft aquaculture system through the cooperation of the other second electric valve 115 and the delivery pipe. When all the aquaculture water in the second treatment tank 103 is pumped out and the preliminary treatment is completed and discharged back to the raft aquaculture system, the controller 117 is directly used to close one of the centrifugal pumps 105 and the other second electric valve 115. As the biofilm on the filter media surface of the filter layer 122 matures, the ability of the microorganisms to degrade and transform pollutants will continuously increase. At this time, the controller 117 is used to start two centrifugal pumps 105, open the first electric valve 104, and the other second electric valve 115 simultaneously,At this time, the water transported by the water supply pipe will first enter the interior of the second treatment tank 103, then enter the interior of the first treatment tank 102, and then be treated by the filtering layer 122, and then be discharged back into the raft aquaculture system. At this time, the pollutants in the aquaculture water discharged back into the raft aquaculture system will be adsorbed by the filter media in the filtering layer 122, and at the same time, the microorganisms will also decompose and metabolize the pollutants using the dissolved oxygen in the water, thereby purifying the water quality.

[0037] Example 2: According to Figures 1 - 9As shown in the figure, an auxiliary mechanism 2 is provided on the biological filter body 1. The auxiliary mechanism 2 includes a rectangular block 201. A plurality of support rods 202 and a plurality of porous air suction pipes 203 are fixed at positions near the edge of the bottom of the rectangular block 201. Three rectangular grooves 204 are preset on the top of the rectangular block 201. An activated carbon layer 205 is placed inside one of the rectangular grooves 204. A gas collecting pipe 206 is provided at the bottom of the rectangular block 201. A plurality of fixing seats 207 are fixed on the gas collecting pipe 206. The air outlet end of the gas collecting pipe 206 is communicated with a first three-way pipe 208. Two fan bodies 209 are additionally installed at the bottom of the inner wall of the middle rectangular groove 204. A second three-way pipe 210 is communicated between the air outlet ends of the two fan bodies 209. The air outlet end of the second three-way pipe 210 is communicated with a gas distribution pipe 211. Two air guide pipes 212 are fixedly penetrated through the inner wall of the other rectangular groove 204. Check valves 213 are installed at the air outlet ends of the two air guide pipes 212. A box cover 214 is additionally installed on the top of the rectangular block 201. A pressure relief valve 215 is additionally installed at the top inlet of the box cover 214. The plurality of porous air suction pipes 203 and the plurality of support rods 202 are arranged in a relatively staggered manner. The plurality of fixing seats 207 are all installed at the bottom of the rectangular block 201. Each air inlet end of the gas collecting pipe 206 is respectively connected to the air outlet end of each porous air suction pipe 203. The air outlet end of the gas collecting pipe 206 movably penetrates through the bottom of the rectangular block 201, and the air outlet end of the gas collecting pipe 206 extends into the middle rectangular groove 204. The air inlet ends of the two fan bodies 209 are respectively connected to the two air outlet ends of the first three-way pipe 208. The air outlet end of the second three-way pipe 210 fixedly penetrates through the inner wall of the middle rectangular groove 204, and the air outlet end of the second three-way pipe 210 extends into one of the rectangular grooves 204. The gas distribution pipe 211 is located inside one of the rectangular grooves 204, and the gas distribution pipe 211 is buried inside the activated carbon layer 205. The air inlet ends of the two air guide pipes 212 are both fixedly penetrated through the inner wall of the middle rectangular groove 204, and the air inlet ends of the two air guide pipes 212 are both communicated with the inside of one of the rectangular grooves 204. The air outlet ports of the two check valves 213 are both close to the bottom of the inner wall of the other rectangular groove 204. The biological filter body 1 includes two support blocks 101 and a controller 117. A first treatment box 102 is fixed between the tops of the two support blocks 101. The plurality of porous air suction pipes 203 are all located between the rectangular block 201 and the first treatment box 102. A diverter 120 is provided on the top of the first treatment box 102. A plurality of auxiliary rings 3 are additionally installed at a position near the top of the surface of the rectangular block 201. A plurality of hanging rings 4 are additionally installed on the upper side of the box cover 214. The diverter 120 is located between the plurality of porous air suction pipes 203 and the first treatment box 102.

[0038] In this embodiment, during the process of microbial biofilm formation and subsequent treatment, the controller 117 will also start two fan bodies 209 simultaneously. At this time, the two started fan bodies 209 will cooperate with the first three-way pipe 208 and the gas collecting pipe 206 to enable each air inlet of each porous air suction pipe 203 to obtain suction. At this time, during the microbial biofilm formation and aquaculture water treatment process, substances (such as sulfur-containing compounds, nitrogen-containing compounds, volatile organic compounds, and microbial aerogels, etc.) volatilized or emitted from the raft aquaculture water into the air will be sucked away, and then transported to the inside of the second three-way pipe 210, and then transported to the inside of the air distribution pipe 211, and then evenly distributed in the activated carbon layer 205. When the air carrying substances is dispersed on the activated carbon layer 205, at this time, the activated carbon layer 205 will adsorb and process the substances carried in the air. Subsequently, the preliminarily treated air will enter the inside of the two air guide pipes 212, and then enter the inside of the corresponding check valves 213, and then all be transported to the disinfection water inside another rectangular tank 204. When the treated air contacts the disinfection water, at this time, the disinfection water will kill the viruses carried in the air. Subsequently, the air treated again will emerge from the disinfection water. When the inside of another rectangular tank 204 continuously accumulates the treated air, at this time, the air pressure inside another rectangular tank 204 will increase. When the air pressure exceeds the threshold set by the pressure relief valve 215, at this time, the excess air inside another rectangular tank 204 will be discharged from the air outlet of the pressure relief valve 215, that is, the treatment of the substances volatilized or emitted from the aquaculture water into the air is realized.

[0039] The effects and working principles achieved by the entire mechanism are as follows:

[0040] In the preparation stage, first, with the cooperation of a crane and multiple auxiliary rings 3, the entire auxiliary mechanism 2 is lifted, and then the lifted auxiliary mechanism 2 is moved directly above the biological filter tank body 1. Then, the auxiliary mechanism 2 is lowered until the bottom ends of all the support rods 202 are slidably embedded in the first treatment tank 102. Then, the water inlet pipe 107 is connected to the water supply pipe for transporting aquaculture water (the water to be purified, pumped from the raft aquaculture system). Then, the water outlet pipe 108 is disconnected from the water inlet end of the second treatment tank 103. Then, through the cooperation of the water inlet end of the second treatment tank 103, an appropriate amount of microbial agent is injected into the inside of the second treatment tank 103. Finally, the water outlet pipe 108 is reinstalled in place, and at the same time, the controller 117 is installed in a suitable position, and the external power supply is connected. After completing the connection of the external power supply, the controller 117 is turned on, and various parameters are set. At the same time, the pressure relief valve 215 is removed, and an appropriate amount of disinfection water (sodium hypochlorite solution) is injected into the inside of another rectangular tank 204 through the top inlet of the box cover 214. Then, the pressure relief valve 215 is reinstalled in place, and the thresholds of the pressure relief valve 215 and the safety valve 124 are manually adjusted (adjusted according to the actual situation);

[0041] During the biofilm formation stage, when it is necessary to allow microorganisms to adhere to the surface of the filter layer 122, first, the controller 117 is used to start another centrifugal pump 105. The centrifugal pump 105 that is started at this time will cooperate with the water inlet pipe 107 to transport the aquaculture water delivered by the water supply pipe into the interior of the water outlet pipe 108, and then into the interior of the second treatment tank 103. At this time, the aquaculture water entering the interior of the second treatment tank 103 will be mixed with the microbial inoculant. When an appropriate amount of aquaculture water is injected into the interior of the second treatment tank 103, the controller 117 is used to pause another centrifugal pump 105 at this time. Subsequently, the blower 113 is started. The blower 113 that is started at this time will cooperate with the filter disc 114 to filter and then inhale the air in the environment, and then transport it into the interior of the air outlet pipe 111, and then into the interior of the multi-way pipe 110. After that, it is shunted and transported into the interior of each one-way valve 118, and then into the interior of the corresponding porous pipe 109. After that, it is all transported into the interior of the second treatment tank 103. When gas is continuously injected into the interior of the second treatment tank 103, under the agitation of the gas at this time, the microbial inoculant will be fully mixed with the aquaculture water, and at the same time, the microbial inoculant will obtain sufficient oxygen. When the microbial inoculant and the aquaculture water are fully mixed for a period of time, the controller 117 is used to pause the blower 113 at this time. Subsequently, the first electric valve 104, one of the second electric valves 115, and one of the centrifugal pumps 105 are opened. The centrifugal pump 105 that is started at this time will cooperate with the opened first electric valve 104 and the connecting pipe 106 to pump away the aquaculture water carrying the microbial inoculant, and then transport it into the interior of the diversion pipe 119, and then into the interior of the diverter 120. After that, it is evenly scattered on the filter layer 122. Then, the filtered aquaculture water will enter the interior of the return pipe 116 through one of the opened second electric valves 115, and then return to the interior of the second treatment tank 103 for a new cycle. Repeating this process, the microorganisms can gradually adhere to the filter media surface of the filter layer 122 to form a biofilm. When a biofilm is formed on the filter media surface of the filter layer 122, the controller 117 is used to close one of the second electric valves 115 at this time. Subsequently, the other second electric valve 115 is opened, and before opening, a delivery pipe (for delivering the preliminarily treated water back to the raft aquaculture system) is connected to the water outlet end of the other second electric valve 115. Then, the aquaculture water in the second treatment tank 103 is pumped out again, filtered through the filter layer 122, and then transported back to the raft aquaculture system through the cooperation of the other second electric valve 115 and the delivery pipe. When all the aquaculture water in the second treatment tank 103 is pumped out and the preliminary treatment is completed and discharged back to the raft aquaculture system, the controller 117 is directly used to close one of the centrifugal pumps 105 and the other second electric valve 115;

[0042] During the treatment stage, as the biofilm on the filter media surface of the filtration layer 122 matures, the ability of microorganisms to degrade and transform pollutants will continuously increase. At this time, the controller 117 is used to simultaneously start two centrifugal pumps 105, open the first electric valve 104 and another second electric valve 115. At this time, the water transported by the water supply pipe will first enter the interior of the second treatment tank 103, then enter the interior of the first treatment tank 102, then pass through the filtration layer 122 for treatment, and then be discharged back into the raft aquaculture system. At this time, the pollutants in the aquaculture water discharged back into the raft aquaculture system will be adsorbed by the filter media in the filtration layer 122. At the same time, the microorganisms also use the dissolved oxygen in the water to decompose and metabolize the pollutants, purifying the water quality. At the same time, during the process of microorganism film formation and subsequent treatment, the controller 117 will also simultaneously start two fan bodies 209. At this time, the two started fan bodies 209 will cooperate through the first three-way pipe 208 and the air collecting pipe 206 to make each air inlet of each porous air suction pipe 203 obtain suction. At this time, during the process of microorganism film formation and aquaculture water treatment, the substances (such as sulfur compounds, nitrogen compounds, volatile organic compounds, and microbial aerogels, etc.) volatilized or emitted from the raft aquaculture water into the air will be sucked away, then transported into the interior of the second three-way pipe 210, then transported into the interior of the air distribution pipe 211, and then evenly distributed in the activated carbon layer 205. When the air carrying substances is dispersed on the activated carbon layer 205, at this time, the activated carbon layer 205 will adsorb and treat the substances carried in the air. Then, the preliminarily treated air will enter the interior of two air guide pipes 212, then enter the interior of the corresponding check valve 213, and then be transported into the disinfection water inside another rectangular tank 204. When the treated air contacts the disinfection water, at this time, the disinfection water will kill the viruses carried in the air. Then, the air treated again will emerge from the disinfection water. When the interior of another rectangular tank 204 continuously accumulates the treated air, at this time, the air pressure inside another rectangular tank 204 will increase. When the air pressure exceeds the threshold set by the pressure relief valve 215, at this time, the excess air inside another rectangular tank 204 will be discharged from the air outlet of the pressure relief valve 215, that is, the treatment of the substances volatilized or emitted from the aquaculture water into the air is realized.

[0043] Among them, a wire passing hole is reserved on the inner wall of the middle rectangular tank 204.

[0044] Among them, the first electric valve 104, the centrifugal pump 105, the blower 113, the second electric valve 115, the controller 117 (PLC controller), the one-way valve 118, the safety valve 124, the filtration layer 122 (laid by a variety of filter media), the activated carbon layer 205 (laid by activated carbon particles), the fan body 209, the check valve 213, and the pressure relief valve 215 are all existing technologies, and their models can be selected according to the actual situation and will not be explained in detail here.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Biological filter for raft aquaculture water purification, comprising a biological filter body (1), characterized in that: An auxiliary mechanism (2) is provided on the biological filter body (1); The auxiliary mechanism (2) includes a rectangular block (201). A plurality of support rods (202) and a plurality of porous air suction pipes (203) are fixed at positions near the edge of the bottom of the rectangular block (201). Three rectangular grooves (204) are preset at the top of the rectangular block (201). An activated carbon layer (205) is placed inside one of the rectangular grooves (204). A gas collecting pipe (206) is arranged at the bottom of the rectangular block (201). A plurality of fixing seats (207) are fixed on the gas collecting pipe (206). The air outlet end of the gas collecting pipe (206) is communicated with a first three-way pipe (208). Two fan bodies (209) are additionally installed at the bottom of the inner wall of the middle rectangular groove (204). A second three-way pipe (210) is communicated between the air outlet ends of the two fan bodies (209). The air outlet end of the second three-way pipe (210) is communicated with a gas distribution pipe (211). Two air guide pipes (212) are fixedly penetrated through the inner wall of the other rectangular groove (204). Check valves (213) are installed at the air outlet ends of the two air guide pipes (212). A box cover (214) is additionally installed at the top of the rectangular block (201). A pressure relief valve (215) is additionally installed at the top inlet of the box cover (214).

2. The biological filter for purifying water quality in raft aquaculture according to claim 1, characterized in that: The plurality of porous air suction pipes (203) and the plurality of support rods (202) are arranged in a relatively staggered manner. The plurality of fixing seats (207) are all installed at the bottom of the rectangular block (201). Each air inlet end of the gas collecting pipe (206) is respectively communicated with the air outlet end of each porous air suction pipe (203). The air outlet end of the gas collecting pipe (206) movably penetrates through the bottom of the rectangular block (201), and the air outlet end of the gas collecting pipe (206) extends into the middle rectangular groove (204).

3. The biological filter for purifying raft aquaculture water quality according to claim 1, characterized in that: The air inlet ends of the two fan bodies (209) are respectively communicated with the two air outlet ends of the first three-way pipe (208). The air outlet end of the second three-way pipe (210) fixedly penetrates through the inner wall of the middle rectangular groove (204). The air outlet end of the second three-way pipe (210) extends into one of the rectangular grooves (204). The gas distribution pipe (211) is located inside one of the rectangular grooves (204).

4. The biological filter for purifying water quality in raft aquaculture according to claim 1, characterized in that: The gas distribution pipe (211) is buried in the activated carbon layer (205). The air inlet ends of the two air guide pipes (212) are fixedly penetrated through the inner wall of the middle rectangular groove (204). The air inlet ends of the two air guide pipes (212) are both communicated with the inside of one of the rectangular grooves (204). The air outlet ports of the two check valves (213) are both close to the bottom of the inner wall of the other rectangular groove (204).

5. The biological filter for purifying water quality in raft aquaculture according to claim 1, characterized in that: The biological filter body (1) includes two support blocks (101) and a controller (117). A first treatment box (102) is fixed between the tops of the two support blocks (101). The bottom ends of the multiple support blocks (101) are all slidably embedded in the top of the first treatment box (102). The multiple porous air suction pipes (203) are all located between the rectangular block (201) and the first treatment box (102). The bottom of the first treatment box (102) is fixed with a second treatment box (103). The bottom of the second treatment box (103) and the bottoms of the two support blocks (101) are on the same horizontal plane.

6. The biological filter for purifying water quality in raft aquaculture according to claim 5, characterized in that: The liquid outlet end of the bottom end of the second treatment box (103) is communicated with a first electric valve (104). Placing plates (123) are fixed on both sides of the second treatment box (103). The two placing plates (123) are respectively fixed to the two support blocks (101). Two centrifugal pumps (105) and a blower (113) are additionally installed on the top of one of the placing plates (123). The liquid outlet end of the first electric valve (104) is communicated with a connecting pipe (106). The liquid outlet end of the connecting pipe (106) movably penetrates through the surface of one of the support blocks (101). The liquid inlet end of one of the centrifugal pumps (105) is communicated with the liquid outlet end of the connecting pipe (106). The liquid inlet end of the other centrifugal pump (105) is communicated with a water inlet pipe (107).

7. The biological filter for purifying water quality in raft aquaculture according to claim 6, characterized in that: The liquid outlet end of the other centrifugal pump (105) is communicated with a water outlet pipe (108). The water outlet end of the water outlet pipe (108) is communicated with the top liquid inlet end of the second treatment box (103). A plurality of porous pipes (109) are installed at a position close to the bottom of the outer wall of the second treatment box (103). The gas outlet ends of the multiple porous pipes (109) all movably penetrate through the outer wall of the second treatment box (103) and extend into the second treatment box (103). The gas inlet ends of the multiple porous pipes (109) are all communicated with one-way valves (118). A multi-way pipe (110) is communicated between the gas inlet ends of the multiple one-way valves (118).

8. The biological filter for purifying water quality in raft aquaculture according to claim 7, wherein: The gas inlet end of the multi-way pipe (110) is communicated with an air outlet pipe (111). An auxiliary frame (112) is fixed at a position close to the bottom of the outer wall of the second treatment box (103). The air outlet pipe (111) is placed on the auxiliary frame (112). The air outlet end of the blower (113) is communicated with the air inlet end of the air outlet pipe (111). A filter disc (114) is additionally installed at the air inlet end of the blower (113). Second electric valves (115) are additionally installed at the two liquid outlet ends of the bottom end of the first treatment box (102). The liquid outlet end of one of the second electric valves (115) is communicated with a return pipe (116).

9. The biological filter for purifying water quality in raft aquaculture according to claim 8, characterized in that: The liquid outlet end of the reflux pipe (116) sequentially penetrates through the surface of one of the support blocks (101) and the outer wall of the second treatment tank (103) movably, and the inside of the liquid outlet end of the reflux pipe (116) is communicated with the inside of the second treatment tank (103). The liquid outlet end of one of the centrifugal pumps (105) is communicated with a diversion pipe (119). The input end of the diversion pipe (119) fixedly penetrates through the top of the inner wall of the first treatment tank (102). A flow divider (120) is arranged on the top of the first treatment tank (102). The liquid inlet end of the flow divider (120) is communicated with the liquid outlet end of the diversion pipe (119).

10. The biological filter for purifying water quality in raft aquaculture according to claim 9, wherein: A stabilizing seat (121) is fixedly sleeved on each branch of the flow divider (120). A plurality of the stabilizing seats (121) are all installed on the top of the first treatment tank (102). A filter layer (122) is arranged inside the first treatment tank (102). The diversion pipe (119) is buried inside the filter layer (122). A safety valve (124) is additionally installed at the air outlet end near the top of the surface of the second treatment tank (103). A plurality of auxiliary rings (3) are additionally installed at the position near the top of the surface of the rectangular block (201). A plurality of hanging rings (4) are additionally installed on the upper side of the box cover (214). The flow divider (120) is located between a plurality of porous air suction pipes (203) and the first treatment tank (102).

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