Greenhouse water circulation system of ecological breeding nitrification tank and circulation method of greenhouse water circulation system

Abstract

The invention discloses a greenhouse water circulation system of an ecological breeding nitrification tank and a circulation method of the greenhouse water circulation system. The greenhouse water circulation system comprises an aquaculture pond, a vegetable planting bed and the nitrification tank which are arranged in a greenhouse; excrement generated in the aquaculture pond can be conveyed into the nitrification pond, and nutrient-containing fertilizer water is generated in the nitrification pond; an irrigation mechanism is arranged on the vegetable planting bed and can be used for watering vegetables by using fertilizer water generated in the nitrification tank; a cooling module is further arranged in the greenhouse and comprises a controller, a temperature monitoring mechanism, a ventilation mechanism and a spraying mechanism. The spraying mechanism is arranged on the vegetable planting bed, so that part of sprayed water mist can fall into the vegetable planting bed; the controller monitors the temperature in the greenhouse through the temperature monitoring mechanism and controls the ventilation mechanism and the spraying mechanism to be started when the high temperature is detected, so that sprayed water mist is evaporated in an accelerated mode under the action of airflow, and the temperature in the greenhouse is reduced. The cooling efficiency in the greenhouse in the fish and vegetable symbiotic system can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of ecological agriculture, and in particular to a greenhouse water circulation system of an ecological breeding nitrification pond and a circulation method thereof. Background Art

[0002] The fish-vegetable symbiotic system is an innovative ecological circular agricultural model that organically combines aquaculture with plant cultivation to achieve a closed-loop ecological cycle of "fish-fertilized water - vegetable-purified water - water-fish-raising". The ammonia nitrogen in the excrement is decomposed by microorganisms and converted into nitrates, which become natural fertilizers for plants; plants absorb nutrients, purify water quality, and return to the fish pond for fish growth. When the fish-vegetable symbiotic system is set up in a greenhouse, the temperature in the greenhouse needs to be controlled. However, cooling only by ventilation is inefficient. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a greenhouse water circulation system and a circulation method for an ecological aquaculture nitrification pond, which can improve the cooling efficiency in the greenhouse in the fish-vegetable symbiotic system.

[0004] Technical solution: To achieve the above-mentioned purpose, the greenhouse water circulation system of the ecological breeding nitrification pond of the present invention comprises an aquaculture pond, a vegetable planting bed and a nitrification pond arranged in a greenhouse; the excrement produced in the aquaculture pond can be sent to the nitrification pond, and fertilizer water containing nutrients is produced in the nitrification pond; a watering mechanism is arranged on the vegetable planting bed, and the watering mechanism can use the fertilizer water produced in the nitrification pond to water the vegetables; a cooling module is also arranged in the greenhouse, and the cooling module comprises a controller, a temperature monitoring mechanism, a ventilation mechanism and a spray mechanism; the spray mechanism is arranged on the vegetable planting bed, so that part of the sprayed water mist can fall into the vegetable planting bed; the controller monitors the temperature in the greenhouse through the temperature monitoring mechanism, and controls the ventilation mechanism and the spray mechanism to start when high temperature is detected, so that the sprayed water mist evaporates faster under the action of the airflow, thereby cooling the greenhouse.

[0005] Furthermore, a water collecting pool is provided in the vegetable planting bed, which is connected to the aquaculture pool through a return pipe so that the water in the water collecting pool can flow back into the aquaculture pool; a clean water replenishment pipe is also provided in the greenhouse, which can replenish water to the return pipe.

[0006] Furthermore, the clean water replenishment pipe is connected to the input end of the spray mechanism, and the nitrification tank is connected to the input end of the spray mechanism through a fertilizer water supply pipe; the input end of the spray mechanism is provided with a valve assembly, and the valve assembly is connected to the controller signal; the controller can control the opening and closing of the valve assembly, so that the spray mechanism can selectively spray fertilizer water or clean water.

[0007] Furthermore, a water quality monitoring mechanism is provided in the greenhouse, and the water quality monitoring mechanism is connected to the controller signal; the water quality monitoring mechanism can detect the nutrient concentration in the fertilizer water; the controller can control the opening and closing of the valve assembly according to the nutrient concentration information of the fertilizer water, so that the spray mechanism sprays fertilizer water or clean water.

[0008] Furthermore, the water quality monitoring mechanism is arranged in the fertilizer water supply pipe.

[0009] Furthermore, the spray mechanism includes a plurality of atomizing nozzles, which are arranged upward so that the atomizing nozzles can spray water mist formed by fertilizer water or clean water upward.

[0010] Furthermore, the ventilation mechanism includes an exhaust pipe, which is located above the vegetable planting bed, and an air inlet end of the exhaust pipe is opposite to the atomizing nozzle.

[0011] Furthermore, an adsorption filter device is provided in the exhaust pipe, and the adsorption filter device can filter and adsorb nutrient substances that escape into the air.

[0012] Furthermore, in the circulation method of the greenhouse water circulation system of the ecological breeding nitrification pond, when the nutrients in the fertilizer water are at normal concentration or low concentration, when high temperature is detected, the spray mechanism sprays water mist formed by clean water, and the clean water mist is accelerated to evaporate under the action of airflow, so as to cool the greenhouse; when the nutrients in the fertilizer water are at high concentration, when high temperature is detected, the spray mechanism sprays water mist formed by fertilizer water, and the fertilizer water mist is accelerated to evaporate under the action of airflow, so as to cool the greenhouse, and some nutrients in the fertilizer water mist will escape into the air to consume some nutrients.

[0013] Furthermore, in the case where the nutrients in the fertilizer water are at a relatively high concentration, when a high temperature is detected, the spray mechanism first sprays out the water mist formed by the fertilizer water, and then sprays out the water mist formed by the clean water.

[0014] Beneficial effects: The greenhouse water circulation system and circulation method of the ecological aquaculture nitrification pond of the present invention have the following beneficial effects:

[0015] 1) When the temperature in the greenhouse is too high, the spray mechanism can spray water mist on the vegetable planting bed, and the ventilation mechanism can ventilate the greenhouse to accelerate the evaporation of water under the action of airflow, thereby cooling the greenhouse;

[0016] 2) The spray mechanism can spray out clean water mist or fertilizer water mist. In the fish-vegetable symbiotic system, since the growth cycles of fish and vegetables are not completely synchronized, when the vegetables are harvested and replanted, the vegetable seedlings cannot completely consume the nutrients in the fertilizer water, which will lead to an increase in the nutrient content in the fertilizer water. When the water quality monitoring agency detects that the nutrients in the fertilizer water are at a high concentration, the spray mechanism is allowed to spray fertilizer water mist, and some of the nutrients in the fertilizer water mist will escape into the air, thereby consuming some of the nutrients.

[0017] 3) Since the nutrients in the fertilizer water mist are mainly nitrates, and the volatility of nitrates is worse than that of water, the fertilizer water falling on the vegetable planting bed will be concentrated, further increasing the nutrient concentration of the fertilizer water in the vegetable planting bed; therefore, after the spray mechanism sprays the fertilizer water mist, it will also spray out clean water mist to dilute the fertilizer water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] As attached Figure 1 The greenhouse water circulation system of the ecological breeding nitrification pool includes an aquaculture pool 2, a vegetable planting bed 3 and a nitrification pool 4 arranged in a greenhouse shed 1. The aquaculture pool 2 generally breeds fish, but can also breed other aquatic products. The aquaculture pool 2 is connected to the nitrification pool 4 through a sewage collection pipe, and the excrement generated in the aquaculture pool 2 can be sent to the nitrification pool 4 through a sewage collection pipe 15. In the nitrification pool 4, the ammonia nitrogen in the excrement is decomposed by microorganisms and converted into nitrates, which become natural fertilizers for plants, thereby generating nutrient-containing fertilizer water in the nitrification pool 4. An irrigation mechanism 5 is provided on the vegetable planting bed 3, and the nitrification pool 4 is connected to the irrigation mechanism 5 through a fertilizer water supply pipe 11, and the irrigation mechanism 5 can use the fertilizer water generated in the nitrification pool 4 to water the vegetables. After the plants absorb nutrients, the water quality is purified and returned to the aquaculture pool 2 for fish growth. Thus, aquaculture and vegetable planting are organically combined to realize the ecological cycle of "fish fertile water - vegetable clean water - water fish breeding".

[0021] Since the aquaculture pond 2 and the vegetable planting bed 3 are located in the greenhouse 1, heat is easily accumulated in the greenhouse 1, resulting in an increase in the temperature in the greenhouse 1. Sometimes, it is necessary to cool down the greenhouse 1. Therefore, a cooling module is also provided in the greenhouse 1, and the cooling module includes a controller, a temperature monitoring mechanism, a ventilation mechanism 7 and a spray mechanism 6.

[0022] The ventilation mechanism 7 can ventilate the greenhouse 1 , discharge the hot air in the greenhouse 1 , and allow fresh air from the outside to flow into the greenhouse 1 .

[0023] The spray mechanism 6 is arranged on the vegetable planting bed 3 so that part of the sprayed water mist can fall into the vegetable planting bed 3. The sprayed water mist absorbs heat when evaporating, thereby cooling the greenhouse 1. In aquaponics, due to water consumption such as evaporation, appropriate water supplementation is required in aquaponics to maintain water circulation. Allowing the water mist to fall into the vegetable planting bed 3 can supplement a certain amount of water for the aquaponics water circulation, thereby making more effective use of the water mist.

[0024] The controller monitors the temperature in the greenhouse 1 through the temperature monitoring mechanism. When the temperature monitoring mechanism detects high temperature, it sends a high temperature signal to the controller, and then the controller controls the ventilation mechanism 7 and the spray mechanism 6 to start. The ventilation mechanism 7 discharges the hot air with water mist out of the greenhouse 1 and introduces fresh air into the greenhouse 1. The sprayed water mist will evaporate faster under the action of the airflow to cool the greenhouse 1. Compared with the traditional method of using only the ventilation mechanism 7 for cooling, the present invention uses the ventilation mechanism 7 and the spray mechanism 6 to cool down, which has a higher cooling efficiency for the greenhouse 1.

[0025] There is a water collection tank 8 in the vegetable planting bed 3. Fertilizer water enters the water collection tank 8 through the irrigation system. After the vegetables absorb the nutrients in the fertilizer water, the water quality can be purified. The water collection tank 8 is connected to the aquaculture pool 2 through a return pipe 9, so that the water in the water collection tank 8 can flow back to the aquaculture pool 2. Due to water evaporation and other reasons, the water body will be consumed during the circulation process. Therefore, a clean water replenishment pipe 10 is also provided in the greenhouse 1. The clean water replenishment pipe 10 can replenish water to the return pipe 9 to maintain water circulation.

[0026] The clean water replenishment pipe 10 is connected to the input end of the spray mechanism 6 so that the spray mechanism 6 can spray clean water. The nitrification tank 4 is connected to the input end of the spray mechanism 6 through the fertilizer water supply pipe 11 so that the spray mechanism 6 can also spray fertilizer water. The input end of the spray mechanism 6 is provided with a valve assembly, and the valve assembly is connected to the controller signal. The valve assembly at least includes a first solenoid valve arranged between the clean water replenishment pipe 10 and the spray mechanism 6, and a second solenoid valve arranged between the fertilizer water supply pipe 11 and the spray mechanism 6. The controller can control the opening and closing of the valve assembly so that the spray mechanism 6 can selectively spray fertilizer water or clean water.

[0027] There is a water quality monitoring mechanism in the greenhouse 1, which can monitor the pH value and nitrate concentration in the water to determine the nutrient concentration in the water. The water quality monitoring mechanism is connected to the controller signal. In one embodiment, the water quality monitoring mechanism is arranged in the fertilizer water supply pipe 11. The water quality monitoring mechanism can detect the nutrient concentration in the fertilizer water. The controller can control the opening and closing of the valve assembly according to the nutrient concentration information of the fertilizer water, so that the spray mechanism 6 sprays fertilizer water or clean water.

[0028] In the fish-vegetable symbiotic system, since the growth cycles of fish and vegetables are not completely synchronized, there will be a period when the vegetables are harvested and the seedlings are replanted, but the fish are not harvested. During this period, since the vegetable seedlings have a weak ability to absorb nutrients, they cannot completely consume the nutrients in the fertilizer water, which will increase the nutrient content in the fertilizer water and even cause eutrophication of the water body, destroying the water cycle. Generally, duckweed can be planted on the vegetable planting bed 3 to consume the extra nutrients, or some of the fertilizer water can be temporarily stored elsewhere.

[0029] In the present invention, a circulation method for a greenhouse water circulation system of an ecological aquaculture nitrification pond is provided, which can assist in consuming part of the nutrients when the nutrient concentration in the fertilizer water is too high, and is beneficial to maintaining the nutrient balance in the water body.

[0030] Specifically, when the water quality monitoring mechanism detects that the nutrients in the fertilizer water are at a normal concentration or a low concentration, the controller controls the input end of the spray mechanism 6 to be connected to the clean water supply pipe 10. Then, when the temperature monitoring mechanism detects a high temperature, the controller controls the ventilation mechanism 7 and the spray mechanism 6 to start, so that the spray mechanism 6 sprays water mist formed by clean water, and the clean water mist evaporates faster under the action of the airflow to cool the greenhouse 1.

[0031] When the water quality monitoring mechanism detects that the nutrients in the fertilizer water are at a high concentration, the controller controls the input end of the spray mechanism 6 to be connected to the fertilizer water supply pipe 11. Then when the temperature monitoring mechanism detects a high temperature, the controller controls the ventilation mechanism 7 and the spray mechanism 6 to start, so that the spray mechanism 6 sprays a mist formed by the fertilizer water. The fertilizer water mist accelerates evaporation under the action of the airflow, cools the greenhouse 1, and some nutrients in the fertilizer water mist will escape into the air to consume some nutrients. Then the clean water replenishment pipe 10 replenishes clean water to the return pipe 9 to replenish the consumed amount of fertilizer water and maintain water circulation. Since the fertilizer water is consumed and clean water is replenished, the nutrient concentration in the fertilizer water can be reduced.

[0032] In short, when the temperature in the greenhouse 1 needs to be lowered, the type of water mist sprayed by the spray mechanism 6 is adjusted according to the nutrient concentration in the fertilizer water. Generally, the spray mechanism 6 sprays clean water mist, but when the nutrient concentration in the fertilizer water is high, the spray mechanism 6 sprays fertilizer water mist instead, so that the nutrients in the fertilizer water are dissipated into the air when the water evaporates, thereby consuming part of the nutrients in the fertilizer water and assisting in changing the water quality.

[0033] In actual applications, since it is uncontrollable when the temperature in the greenhouse 1 needs to be lowered, the number of sprays and the spray interval of the spray mechanism 6 are also uncontrollable. Therefore, the spraying of fertilizer water mist can only be used as a way to assist in consuming nutrients, and it needs to be used in combination with planting duckweed and temporarily storing fertilizer water.

[0034] Vegetables can be roughly divided into fruit vegetables and leafy vegetables. Fruit vegetables include eggplants and tomatoes, while leafy vegetables include lettuce and water spinach. The leaves of fruit vegetables have a thick wax layer, so they have a poor ability to absorb nutrients. If fertilizer water is sprayed directly on the leaves of fruit vegetables, the leaves may turn yellow. However, the leaves of leafy vegetables have a strong ability to absorb nutrients, so spraying fertilizer water containing nutrients directly on the leaves of leafy vegetables generally does not cause the leaves to turn yellow.

[0035] However, in actual application, when the vegetable planting bed is leafy and the nutrient concentration in the fertilizer water is too high, the temperature in the greenhouse is too high around 1 to 3 pm, and the temperature is cooled by spraying fertilizer water mist, but the leaves of the leafy vegetables also turn yellow. Since it is not common for leafy vegetable leaves to turn yellow after spraying fertilizer water, the influence of pests and diseases was considered at first, but it was ruled out after research. Later, the influence of high temperature was also considered, but it was ruled out after specific research, and finally it returned to the consideration of nutrient concentration.

[0036] Finally, after research, it was found that since the spray mechanism 6 is set on the vegetable planting bed 3, when spraying water mist, the smaller water mist particles will be carried away by the wind, while the larger water mist particles will fall on the vegetables under the action of gravity. The nutrients in the fertilizer water mist are nitrates, and the volatility of nitrates is worse than that of water. Since the spraying of fertilizer water mist is already in high temperature conditions, and the ventilation mechanism is also working during the spraying of water mist, the combined effect of the three conditions of high temperature, ventilation and small water mist particles causes extremely strong water evaporation, resulting in a very high concentration of nitrates falling on the leaves of leafy vegetables, far exceeding the nitrate concentration in the normal sprayed fertilizer water. Therefore, even leafy vegetables that can originally tolerate fertilizer water, such as water spinach and lettuce, will have yellowing leaves after the fertilizer water mist is sprayed.

[0037] Therefore, in the present invention, after the spray mechanism 6 sprays out the water mist formed by the fertilizer water, the controller controls the input end of the spray mechanism 6 to be connected to the clean water replenishment pipe 10, so that the spray mechanism 6 sprays out the water mist formed by the clean water after spraying the fertilizer water, so as to dilute the high concentration of nitrates falling on the vegetable leaves, and also play the role of washing the vegetable leaves, thereby avoiding the yellowing of the vegetable leaves.

[0038] The spray mechanism 6 includes a spray pipe, which is arranged along the length direction of the vegetable planting bed 3 and is located above the vegetable planting bed 3. A plurality of atomizing nozzles 12 are arranged on the spray pipe, and the atomizing nozzles 12 are arranged upward so that the atomizing nozzles 12 can spray water mist formed by fertilizer water or clean water upward. Compared with the water mist sprayed downward, the water mist sprayed upward can diffuse farther in the air and has a better cooling effect.

[0039] The ventilation mechanism 7 includes an exhaust pipe and an air inlet pipe, and fans are provided on both the air inlet pipe and the exhaust pipe. The air inlet pipe is located in the greenhouse 1 away from the exhaust pipe, so that the air flow flows through the entire greenhouse 1 as much as possible to achieve a better ventilation effect. The exhaust pipe is located above the vegetable planting bed 3, and the air inlet end of the exhaust pipe is opposite to the atomizing nozzle 12.

[0040] When nutrients escape into the air, the air will be polluted to a certain extent. Therefore, the spray mechanism 6 should be used in conjunction with the ventilation mechanism 7 when spraying fertilizer water mist, and an adsorption filter device is provided in the exhaust pipe. The adsorption filter device can filter and adsorb the nutrients escaped into the air to keep the air clean. The adsorption filter device can be activated carbon or the like.

[0041] The present invention also arranges a photovoltaic panel 13 on the top of the greenhouse 1 . After the photovoltaic panel 13 generates electricity, it can supply power to various devices in the greenhouse 1 .

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. The greenhouse water circulation system of the ecological breeding nitrification pond is characterized by: The invention comprises an aquaculture pond (2), a vegetable planting bed (3) and a nitrification pond (4) arranged in a greenhouse (1); the excrement produced in the aquaculture pond (2) can be sent to the nitrification pond (4), and fertilizer water containing nutrients is produced in the nitrification pond (4); an irrigation mechanism (5) is arranged on the vegetable planting bed (3), and the irrigation mechanism (5) can use the fertilizer water produced in the nitrification pond (4) to water the vegetables; A cooling module is also provided in the greenhouse (1), and the cooling module comprises a controller, a temperature monitoring mechanism, a ventilation mechanism (7) and a spray mechanism (6); the spray mechanism (6) is provided on the vegetable planting bed (3) so that part of the sprayed water mist can fall into the vegetable planting bed (3); the controller monitors the temperature in the greenhouse (1) through the temperature monitoring mechanism, and controls the ventilation mechanism (7) and the spray mechanism (6) to start when a high temperature is detected, so that the sprayed water mist evaporates faster under the action of the airflow, thereby cooling the greenhouse (1).

2. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 1 is characterized in that: The vegetable planting bed (3) is provided with a water collection pool (8), which is connected to the aquaculture pool (2) via a return pipe (9), so that water in the water collection pool (8) can flow back into the aquaculture pool (2); the greenhouse (1) is also provided with a clean water replenishment pipe (10), which can replenish water to the return pipe (9).

3. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 2 is characterized in that: The clean water replenishment pipe (10) is connected to the input end of the spray mechanism (6), and the nitrification tank (4) is connected to the input end of the spray mechanism (6) via a fertilizer water supply pipe (11); the input end of the spray mechanism (6) is provided with a valve assembly, and the valve assembly is connected to the controller signal; the controller can control the opening and closing of the valve assembly, so that the spray mechanism (6) can selectively spray fertilizer water or clean water.

4. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 3 is characterized by: A water quality monitoring mechanism is provided in the greenhouse (1), and the water quality monitoring mechanism is connected to the controller signal; the water quality monitoring mechanism can detect the nutrient concentration in the fertilizer water; the controller can control the opening and closing of the valve assembly according to the nutrient concentration information of the fertilizer water, so that the spray mechanism (6) sprays fertilizer water or clean water.

5. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 4 is characterized in that: The water quality monitoring mechanism is arranged in the fertilizer water supply pipe (11).

6. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 4 is characterized by: The spray mechanism (6) comprises a plurality of atomizing nozzles (12), and the atomizing nozzles (12) are arranged upward so that the atomizing nozzles (12) can spray water mist formed by fertilizer water or clean water upward.

7. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 6 is characterized by: The ventilation mechanism (7) comprises an exhaust pipe, which is located above the vegetable planting bed (3), and the air inlet end of the exhaust pipe is opposite to the atomizing nozzle (12).

8. The greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 7 is characterized by: An adsorption filter device is arranged in the exhaust pipe, and the adsorption filter device can filter and adsorb the nutrient substances that escape into the air.

9. The circulation method of the greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 4, characterized in that: When the nutrients in the fertilizer water are at a normal concentration or a relatively low concentration, and a high temperature is detected, the spray mechanism (6) sprays water mist formed by clean water, and the clean water mist evaporates faster under the action of the airflow, thereby cooling the greenhouse (1); When the nutrients in the fertilizer water are at a high concentration and a high temperature is detected, the spray mechanism (6) sprays out a mist formed by the fertilizer water. The fertilizer water mist evaporates faster under the action of the airflow, thereby cooling the greenhouse (1). In addition, some nutrients in the fertilizer water mist will escape into the air to consume some of the nutrients.

10. The circulation method of the greenhouse water circulation system of the ecological aquaculture nitrification pond according to claim 9, characterized in that: When the nutrients in the fertilizer water are at a relatively high concentration and a high temperature is detected, the spray mechanism (6) first sprays out the water mist formed by the fertilizer water and then sprays out the water mist formed by the clean water.

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