WO2009018703A1

WO2009018703A1 - System for breeding marine living

Info

Publication number: WO2009018703A1
Application number: PCT/CN2007/070617
Authority: WO
Inventors: Shengheng Xu
Original assignee: Shengheng Xu
Priority date: 2007-08-07
Filing date: 2007-09-04
Publication date: 2009-02-12
Also published as: CN101361465B; TWI322665B; CN101361465A; TW200915977A

Abstract

A system for breeding marine living comprises a culturing pond (2) and a temperature regulation apparatus by use of water replacement. The apparatus comprises a first closed-cycle heat transfer circuit (7), a heat pump (3) and a second closed-cycle heat transfer circuit (8), all of which are connected in turn in the manner of heat interchange. The apparatus also comprises a seawater supplement pipe (9), a first opened heat transfer circuit (10), a second opened heat transfer circuit (11), a drain pipe (16) and a first by-pass drain pipe (17). A heat exposure side of the first closed-cycle heat transfer circuit (7) is coupled with a supply heat side of a low energy exchanger (4). A supply heat side of the second closed-cycle heat transfer circuit (8) is coupled with a heat exposure side of a high energy exchanger (6). The second opened heat transfer circuit (11) is also connected with a beach earth heat collecting well (1). The system heats or refrigerates supplemental fresh seawater through collecting earth heat or draining the heat of seawater and therefore energy consumption is greatly reduced.

Description

Energy-saving and environmentally friendly marine aquaculture system

The invention relates to a water temperature constant technology of a culture system, in particular to an energy-saving and environmentally-friendly marine biological culture system. Background technique

In the marine aquaculture industry, scenes with high water temperature requirements, such as the cultivation of fry, and the cultivation of some rare seafood, often require a relatively constant water temperature; and fresh seawater is also required to flow.

At present, for these special water temperature needs, it is common to establish a seawater circulation system for the culture pond, continuously discharge old seawater and replenish fresh seawater, and in the process of fresh seawater supplementation, the method of heating the seawater by boiler heating is to supplement the pipe in fresh seawater. On the road, a heating boiler is used to warm the seawater in the supplementary pipeline, and the heated seawater is sent to the culture tank, thereby keeping the temperature of the seawater in the culture tank constant.

Due to the large breeding ponds, the amount of seawater that needs to be recycled is also large, and heating and replenishing seawater requires a large amount of energy. For example, a 2,000-cubic-meter fry pond needs to be kept at a temperature of 10 °C - 15 °C. When the seawater temperature is 3 °C, every 1/10 of the seawater is 200 cubic meters, which is equivalent to 2000 kW. Energy consumption.

At the same time, burning boilers in farming areas will also cause pollution to the local environment, worsen the local ecological environment, and break the local ecological chain. In severe cases, some marine species will disappear.

China Invention Patent No. 200410080524. No. 2 (publication number CN1755294A) published on April 5, 2004 (Public No. CN1755294A) "Low-grade energy extraction system for rivers and lakes", the system discloses an energy harvesting device connected in turn by coupling heat exchange, first closed Heat transfer circuit, heat pump, second closed heat transfer circuit and load radiator, there are 2 sets of 8 control valves between the first and second closed heat transfer circuits, and the radiator is condensed from the heat pump as needed. The device acquires high temperature heat energy or obtains low temperature heat energy from the heat pump evaporator. This application is the development and application of this system. Summary of the invention

In order to compensate for the shortage of boiler heating, the object of the present invention is to provide an energy-saving and environmentally-friendly marine aquaculture system capable of reducing energy consumption and protecting the environment.

The energy-saving and environmentally-friendly marine biological breeding system of the invention comprises a breeding pond and a water-changing temperature-lowering device thereof, wherein the water-changing temperature-lowering device comprises a first closed-loop heat transfer circuit, a heat pump and a second closed connected in turn by a coupling heat exchange mode a circulating heat transfer circuit, between the first and second closed cycle heat transfer circuits, two sets of eight reversing valves for raising or lowering the water in the culture tank, wherein the water change The cooling device also includes a seawater replenishing pipeline, a first open heat transfer circuit, a second open heat transfer circuit, a drain line, and a first drain split branch line, wherein the seawater water supply line is connected by a water supply port, a make-up water pump, a heated side of the water supply heat exchanger, and a water supply pipe connected to the culture pond; the first open heat transfer circuit is composed of a hot water line connected in series, a heating side of the water replenishing heat exchanger, a water control valve and a first drainage branch; The second open heat transfer circuit is composed of a hot water line connected in series, a heating side of the water replenishing heat exchanger, a heat pump valve, a heating side of the low heat heat exchanger, and a second drain branch; the drain line The utility model is composed of a drain pipe, a drain pump, a drain valve and a drain port connected in series with the culture tank; the first drain split branch line is a pipeline connected to the drain pipeline in series, and the first drain diverter valve a heating side of the high heat energy heat exchanger, a heat supplement valve, and a pipeline communicating with the hot and cold water pipeline; the hot and cold water pipeline is connected to the drain pipeline via the second drain diverter valve; the first closed loop Heat transfer circuit Heating side of the low heat side heat exchanger coupled; closed cycle heat transfer to the second heat receiving circuit side to the high energy side heat exchanger coupled.

The energy-saving and environmentally-friendly marine biological breeding system of the present invention further comprises a seawater geothermal pipeline, wherein the seawater geothermal pipeline comprises a beach geothermal well, a geothermal heat pump, a geothermal valve and a pipeline communicating with the hot and cold water pipeline.

The energy-saving and environmentally-friendly marine biological breeding system of the invention adopts the heat of collecting geothermal heat or discharging seawater to heat and replenish fresh seawater, thereby greatly reducing energy consumption. When using geothermal heat, only 200 kilowatts of energy is consumed for replacing 200 cubic meters of seawater; when using heat pump, consumption Can be 105 kW. At the same time, when the temperature of the hot aquaculture pond is high, it can be heated to cool by changing the connection direction of the heat pump to reduce the temperature of the fresh seawater to be kept, so that the culture pond maintains a low temperature lower than the ambient temperature. The energy-saving and environmentally-friendly marine biological breeding system of the invention does not need to burn coal, and basically does not cause environmental pollution, and can achieve the goal of complete environmental protection. DRAWINGS

1 is a schematic view of an energy-saving and environmentally-friendly marine aquaculture system of the present invention. detailed description

In order to further illustrate the energy-saving and environmentally-friendly marine aquaculture system of the present invention, a more detailed description will be made below in conjunction with the examples.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a specific embodiment of the present invention. The figure shows a recirculating culture tank consisting of a culture tank 2, a water supply port 41, a make-up water pump 12, a drain pump 15, a drain line 16, a drain valve 23 and a drain port 42. Generally, in order to minimize the pollution of seawater to supplement the seawater, the drain port 42 should be away from the water supply port 41, and the water supply port 41 should be selected in a relatively clean seawater area. The function of the make-up water pump 12 is to upgrade the fresh sea water, and the drain pump 15 is Increase the seawater removal in the culture pond 2.

In the water inlet line of the make-up water pump 12 to the breeding tank 2, the heat receiving side of the water supply heat exchanger 5 is connected in series, because of the heat exchanger It consists of two channels that are isolated from each other but can transfer heat through the partition. The two streams flow in opposite directions in the two channels, and the heat carried by the separators is exchanged. In principle, the two channels can be used interchangeably. For the sake of clarity, one is referred to as the heating side and the other is referred to as the heated side.

The heated side of the hydrating heat exchanger 5 is connected in series in the first open heat transfer circuit 10, and the first open heat transfer circuit 10 is connected by the hot and cold water line 43 in series, the heating side of the hydration heat exchanger 5, and the control The water valve 35 and the first drain branch line 46 are formed, and the inlet end thereof is connected to the drain line 16 via the branch valve 22, so that the fresh sea water and the discharged sea water pass through the both sides of the water replenishing heat exchanger 5, respectively, in the water replenishing heat exchanger 5 The exchange of thermal energy is completed, and the heat energy of the discharged water is increased by the heat of the discharged water.

However, due to: 1, the efficiency of the heat exchanger is less than 1; 2, the drainage temperature will not be higher than the water temperature in the culture pond. Only this cycle will inevitably lead to a lower and lower temperature of the water in the culture pond, which will not reach the goal of constant temperature.

For this reason, an additional heat replenishing device is required on the hot and cold water line 43.

In this embodiment, two types of heat supplementing devices are employed.

First, the beach geothermal well 1 is a beach geothermal well on the sandy beach near the breeding pond 2. The geothermal heat pump 51 is used to extract geothermal seawater below the seawater temperature, and is connected to the hot and cold water pipeline 43 via the geothermal valve 24. See Fig. 1), mixed with the discharged water, raised the water temperature, and then sent to the heating side of the water reheating heat exchanger 5, the purpose of the constant water temperature of the culture pond can be achieved. Adjusting the opening degree of the geothermal valve 24 can change the ratio of the geothermal seawater to the discharged water to achieve the purpose of adjusting the water temperature.

However, since the beach geothermal is not controllable by people, it is difficult to achieve the purpose of constant temperature by relying solely on geothermal wells. Therefore, in this embodiment, a water change and temperature rise and fall device is also provided.

As we all know, a heat pump is a closed loop system that uses an evaporator, a compressor, a condenser, and an expansion valve. It collects low-temperature heat through an evaporator and transmits high-energy heat through a condenser to achieve heat-enhancing equipment.

The water change and temperature rise and fall device in this embodiment includes a first open heat transfer circuit 10, a second open heat transfer circuit 11, a first closed cycle heat transfer circuit 7, a heat pump 3, and a second closed cycle heat transfer. Circuit 8, first drain split branch line 17. The seawater replenishing pipeline is composed of a water supply port 41, a make-up water pump 12, a heating side of the water replenishing heat exchanger 5, and a water supply pipe connected to the culture tank 2, and the seawater replenishing pipeline is used for replenishing fresh water to the culture pond 2; The hot and cold water line 43 connected in series, the heating side of the water replenishing heat exchanger 5, the water control valve 35 and the first drain branch line 46 constitute a first open heat transfer circuit 10; the hot and cold water line 43 connected in series The heating side of the hydration heat exchanger 5, the heat pump valve 26, the heating side of the low heat energy heat exchanger 4, and the second drain branch 47 constitute a second open heat transfer circuit 11; the first closed loop heat transfer circuit 7 by the heating side of the low thermal energy heat exchanger 4, the heating valve 27, the first closed cycle The heat supply side of the heat transfer circuit 7 coupled with the evaporator of the heat pump 3, the heating valve 28, and the circulation pump 13 are connected in series; the heat pump 3 is connected in series by an evaporator, a compressor, a condenser and an expansion valve. The second closed cycle heat transfer circuit 8 is connected to the heat side of the heat pump 3 condenser, the heating valve 29, the heating side of the high heat heat exchanger 6, and the heating cycle. The pump 14 and the heating valve two 30 are sequentially connected in series. Between the first and second closed-loop heat transfer circuits, four refrigerating valves 1-3, a refrigerating valve two 32, a refrigerating valve three 33, and a refrigerating valve four 34 are further disposed, and the mounting position and connection manner thereof are as shown in the figure. . Because it is a known technology, it has been described in detail in the "Technical Extraction System of Rivers, Lakes and Seas", which is mentioned in the background art, and will not be described again in order to avoid cumbersomeness. The pipeline connected to the drain line 16 in series, the first drain diverter valve 21, the heated side of the high thermal energy heat exchanger 6, the replenishing valve 25, and the line communicating with the hot and cold water line 43 constitute a first drainage diversion a branch line 17; the hot and cold water line 43 is in communication with the drain line 16 via the second drain diverter valve 22; the heated side of the first closed loop heat transfer circuit 7 is coupled to the heating side of the low thermal energy heat exchanger 4; The heating side of the two closed cycle heat transfer circuit 8 is coupled to the heated side of the high thermal energy heat exchanger 6.

In this example, the state shown in Fig. 1 indicates a state in which fresh seawater in the seawater replenishing line is heated in winter, wherein four heating valves 27, 28, 29, 30 indicate an open state; refrigerating valves 3 1, 32, 33 , 34 (symbol black) indicates the off state. The heat energy transfer process is: the second open heat transfer circuit 11 - the first closed cycle heat transfer circuit 7 → the heat pump 3 → the second closed cycle heat transfer circuit 8 → the first drain split branch line 17 → the second open heat The transfer circuit 11 → the heated side of the water replenishing heat exchanger 5 .

When the fresh seawater in the seawater supplementation pipeline is cooled in summer, the heating valves 27, 28, 29, and 30 in Fig. 1 are in a closed state, and the refrigeration valves 3, 32, 33, and 34 are in an open state, and the heat energy transfer process is: The seawater in the two-open heat transfer circuit 11 (the temperature of the seawater is still lower than the temperature of the fresh seawater) flows through the low-heat heat exchanger 4, and the right side of the low-heat heat exchanger 4 is cooled, that is, the negative heat energy is transmitted. The negative heat energy is transferred to the left side of the second closed cycle heat transfer circuit 8 by the circulation pump 13 and continues to be transmitted to the condenser of the heat pump 3, and the low temperature liquid on the left side of the heat exchanger where the heat pump 3 is located is The heating circulation pump 14 flows to the left side of the high heat energy heat exchanger 6, and then transmits the low temperature to the left side of the first drainage branch line 17, the second open heat transfer circuit 11, and the water reheating heat exchanger 5, so as to pass The make-up water pump 12 enters the fresh seawater of the hydration heat exchanger 5 to cool down.

Because the heat pump has a minimum temperature rise (the minimum lift temperature of the heat pump used in this example is 5 °C). Therefore, on the drain line 16, in addition to a hot and cold water line 43, a first drain split branch 17 is connected, and only the water in the first drain branch 17 can be heated (or cooled) by the heat pump 3. The water in the first drainage branch branch 17 is heated and then mixed with the water in the hot and cold water line 43 and sent to the water replenishing heat exchanger 5 for heat exchange. By adjusting the opening degree of the diverter valve 21 and the bypass valve 22, the ratio of the hot water supply can be adjusted. In this embodiment One-fifth of the water is separated from the diverter valve 21, heated by the heat pump to a temperature of 5 ° C, and then mixed with 4/5 of the water in the hot and cold water line 43 to achieve the purpose of water-lifting C in the hot and cold water line 43. .

In geothermal well 1 and heat pump 3, one or two can be used depending on the actual situation. In the case of both configurations, the geothermal valve 24 and the replenishing valve 25 are the selection tools for deciding which heat to use, the geothermal valve 24 is opened, the replenishing valve 25 is closed, and the geothermal well is used to replenish heat. The water control valve 35 closes the heat pump valve 26; on the contrary, the heat supply valve 25 is opened, the geothermal valve 24 is closed, the heat pump valve 26 is opened, the water control valve 35 is closed, and heat is applied using a heat pump. It is of course possible to use both the geothermal well 1 and the heat pump 3 simultaneously, that is, simultaneously opening the geothermal valve 24 and the heat pump valve 26, and closing the water control valve 35. This is usually the case when the geothermal well 1 can provide some heat and heat. The use of geothermal wells and heat pump systems simultaneously reduces the consumption of electrical energy compared to single-purpose heat pumps.

A drain valve 23 is also required to be disposed on the drain line 16, and the valve is normally closed to ensure that the drain water is exchanged for heat energy through the water replenishing heat exchanger 5; however, in special cases, such as when the culture tank needs to be straight. Open it.

It can be seen that the invention can achieve the purpose of constant temperature by two methods of geothermal heat and heat pump, consumes only a small amount of electric energy, does not consume coal-burning fuel, never pollutes the environment, and can save energy; at the same time, it can be warmed in winter or Cool down in summer. Industrial applicability

The energy-saving and environmentally-friendly marine biological breeding system of the invention adopts the heat of collecting geothermal heat or discharging seawater to heat and replenish fresh seawater, thereby greatly reducing energy consumption. When using geothermal heat, only 200 kilowatts of energy is consumed for replacing 200 cubic meters of seawater; when using heat pump, consumption Can be 105 kW. At the same time, when the temperature of the hot aquaculture pond is high, it can be heated to cool by changing the connection direction of the heat pump to reduce the temperature of the fresh seawater to be kept, so that the culture pond maintains a low temperature lower than the ambient temperature. The energy-saving and environmentally-friendly marine biological breeding system of the invention does not need to burn coal, and basically does not cause environmental pollution, and can achieve the goal of complete environmental protection, and is widely used in aquaculture.

Claims

Rights request

1. An energy-saving and environmentally-friendly marine biological breeding system, comprising a breeding pond (2) and a water-changing temperature-lowering device thereof, wherein the water-changing temperature-lowering device comprises a first closed-loop heat transfer circuit sequentially connected by a coupling heat exchange method ( 7), a heat pump (3), a second closed cycle heat transfer circuit (8), between the first and second closed cycle heat transfer circuits (7, 8) are provided in the breeding pond (2) The two sets of eight reversing valves for heating or cooling the water are characterized in that the water changing and temperature increasing device further comprises a seawater replenishing pipeline (9), a first open heat transfer circuit (10), and a second open heat. a transfer circuit (11), a drain line (16), and a first drain branch line (17), wherein the seawater water supply line is composed of a water supply port (41), a make-up water pump (12), and a water supply heat exchanger (5) The heated side is composed of a water supply pipe connected to the culture tank (2); the first open heat transfer circuit (10) consists of a series of hot and cold water pipes (43) and a water supply heat exchanger (5) Heating side, water control valve (35) and first drain branch

(46) Composition; the second open heat transfer circuit (11) consists of a hot water line (43) connected in series, a heating side of the water replenishing heat exchanger (5), a heat pump valve (26), and a low The heating side of the heat exchanger (4) and the second drain branch (47); the drain line (16) consists of a drain pipe and a drain pump connected in series with the culture tank (2). a drain valve (23) and a drain port (42); the first drain split branch line (17) consists of a pipeline connected in series with the drain line (16), a first drain diverter valve (21), a heating side of the high heat energy heat exchanger (6), a heat supplement valve (25), and a pipeline communicating with the hot and cold water line (43); the hot and cold water line (43) passing through the second drain diverter valve ( 22) communicating with the drain line (16); the heated side of the first closed loop heat transfer circuit (7) is coupled to the heating side of the low thermal energy heat exchanger (4); the second closed type The heat transfer side of the circulating heat transfer circuit (8) is coupled to the heated side of the high thermal energy heat exchanger (6).

2. The energy-saving and environmentally-friendly marine aquaculture system according to claim 1, characterized in that it further comprises a seawater geothermal pipeline (18), wherein the seawater geothermal pipeline (18) consists of a beach geothermal well (1) and a geothermal pump connected in series. (51), a geothermal valve (24) and a pipeline communicating with the hot and cold water pipeline (43).