CN214126591U - Mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system - Google Patents

Abstract

A mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system belongs to the technical field of clean energy and comprises a mariculture sewage source heat pump secondary refrigerant unit, a sewage cellar, a sewage heat exchanger, a seawater heat exchanger, a constant-temperature seawater cellar and the like, wherein a sewage discharge system of a culture workshop is connected with a unit sewage inlet, a unit sewage outlet is connected with the sewage cellar, a unit cold side secondary refrigerant outlet is connected with a sewage heat exchanger inlet, a sewage heat exchanger outlet is connected with a unit cold side secondary refrigerant inlet, a unit hot side secondary refrigerant outlet is connected with the seawater heat exchanger, and a unit hot side secondary refrigerant outlet is connected with a unit hot side secondary refrigerant inlet. The utility model discloses the energy of the sewage waste heat of recycle mariculture emission, as the sewage source of heat pump, by through the secondary refrigerant system, carry out invariable temperature regulation to the marine water of breeding, heat the operation in winter and carry the temperature for the sea water, the sea water cooling is given in the operation of refrigerating in summer.

Description

Mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system

Technical Field

The utility model belongs to the technical field of clean energy, concretely relates to mariculture sewage source heat pump secondary refrigerant cold and hot seawater system of constant temperature.

Background

With the improvement of living standard of people and the demand of social and economic development, the demand of marine products on the market is more and more, the demanded taste is higher and more, people can conveniently taste the marine products all over the world, and people benefit from imported marine products on one hand, and benefit from local mariculture because wild marine products are limited to be caught on the other hand. Mariculture is a production mode for raising and breeding marine economic animals and plants in sea areas such as shallow sea, tidal flat, estuary and pond, and is one of important ways for directional utilization of marine biological resources and development of marine aquaculture by human beings. In recent years, the aquaculture yield of marine fishes is gradually increased year by year. New breeding technology and new breeding varieties are continuously promoted, the breeding field is further expanded, and the scale and intensification degree of the breeding industry is gradually improved. Different organisms cultured in seawater have different living and growing environments, and especially have different requirements on seawater temperature, so that the deep development of the modern aquaculture industry is challenged. The mariculture organisms commonly comprise shrimps, fishes, crabs and shells, the seawater temperature suitable for the growth of the shrimps is 20-28 ℃, and the seawater temperature suitable for the growth of the turbot is 15-18 ℃. At present, the temperature of the seawater for cultivation is basically the natural temperature of natural seawater. Building a culture shed on a shoal by each family of culture farmers of a sea farm along the Bohai sea and the sea area in the yellow sea of the Bohai, building a standardized culture workshop in the shed, drilling a plurality of sea water wells at different places closer to the shoal as required, and storing the drilled sea well water in a seawater storage cellar of the culture shed; the seawater well works every day, water is supplemented to the culture pond constantly, and overflow water is generated to change water and keep the temperature; meanwhile, the feed is fed, the excrement of the organisms and the generated microorganisms can cause the ammonia nitrogen and hydrogen sulfide in the aquaculture water to exceed the standard and the oxygen content to be low, so that the bottom of the aquaculture pond needs to be cleaned regularly, and a large amount of sewage and dirt in an aquaculture workshop is discharged to maintain the water quality and improve the life quality and the survival rate of the cultured organisms. The culture mode defines the growth cycle of cultured organisms: for example, the temperature suitable for the growth of the shrimps is higher, the survival rate of the shrimps is kept, the minimum temperature of the seawater for culturing is more than 18 ℃, the shrimps are required to grow fast, the seawater for culturing is between 20 ℃ and 28 ℃, the growth is stopped when the temperature is higher and higher but exceeds 30 ℃, and the growth period and the sea area of the shrimps are limited under the natural condition of the seawater temperature; for another example, the turbot is a deep-sea cold water fish, the growth is slow, the culture period is 12-18 months, and the influence of factors such as the difficult growth in winter and summer due to unbalanced temperature change in four seasons, the limitation of the water flow of a sea well in a dry period and the like is faced, so that the turbot is easy to get ill in the winter and summer temperature transition period, and the survival rate is unstable: in winter, some mariculture organisms such as turbots start to metabolize slowly at the temperature of 10 ℃ below seawater temperature, and the turbots do not eat, the seawater temperature is reduced to 8 ℃, and the turbots start to hibernate and do not grow, and if the temperature is low for a long time, such as the seawater temperature is lower than 6-7 ℃, the turbots gradually die in a certain proportion; in summer, the temperature of the well water is higher than 19 ℃, the turbot starts to grow the gastrointestinal diseases and dares not to feed, when the temperature of the well water is 20 ℃, the metabolism is slow, the turbot does not like to grow, and when the temperature of the well water is 21-23 ℃, the turbot gradually dies in a certain proportion. The seawater fish farming owner relies on the method of using large-flow water for replacement at present, adjusts the temperature of the water for farming in a limited way, and cannot fundamentally solve the problem of certain economic loss caused by the influence of the seawater temperature. They are thinking and looking for high and new technology enterprises that can help them to produce and manufacture one or more modern devices, so that the temperature of seawater for cultivation can be controlled, and the device is not limited by seasonal temperature changes in the nature.

At present, the mariculture industry is developed into ecological culture, a boiler water-boiling temperature control method is banned by environmental protection, and in the field of energy conservation and environmental protection, a heat pump system is considered as the most effective energy-saving method in a heat energy extraction and utilization mode, such as a ground source heat pump system and a sewage source heat pump system which are promoted in recent years, the heat source of the ground source heat pump system and the sewage source heat pump system is slightly influenced by the fluctuation of the environmental temperature. However, ground source heat pump systems, i.e. ground water source heat pumps and ground source heat pump systems, are often affected by resources and environmental factors and cannot be over-developed and applied. At present, resource recycling and circular economy development are important strategic tasks of economic and social development, each household in the mariculture industry generates and discharges a large amount of aquaculture wastewater every day, and the heat energy of the aquaculture wastewater has huge resource potential, so that if the aquaculture wastewater can be effectively used as a heat source to form a wastewater source heat pump system, resource waste can be avoided to the maximum extent, and a better operation effect can be obtained.

For example, according to a certain mariculture organism, the living temperature range is (7-23 ℃) and the optimum growth temperature range is (15-18 ℃), the sewage source heat pump system can heat low-temperature sea well water (7-10 ℃) in winter to prepare hot sea water with the temperature of (12-15 ℃), and cool high-temperature sea well water (21-23 ℃) in summer to prepare cold sea water with the temperature of (15-18 ℃). Like this, can make mariculture living beings, the growing period has increased winter and summer two seasons, from the seedling to the slaughter, all keeps under the well water ambient temperature who is fit for growing, increases the growth time, improves mariculture living beings's survival rate, reduces the fatality rate, shortens the growth cycle that the single slaughter for breed owner can make many slaughters, creates income more, makes the mariculture trade, and the natural environment's that significantly reduces influence and restraint move towards the ranks of modernized breed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the energy of the sewage waste heat of recycle mariculture emission, as the sewage source of heat pump, by through the secondary refrigerant system, carry out invariable temperature regulation to the marine water for breed, the operation of heating in winter is for the sea water and is carried the temperature, and the sea water cooling is given in the operation of refrigerating in summer, with the invariable scope in certain needs of sea water temperature throughout the year, is a mariculture sewage source heat pump secondary refrigerant cold and hot sea water system of constant temperature.

The utility model adopts the following technical scheme:

a mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system comprises a mariculture sewage source heat pump secondary refrigerant unit, a sewage cellar, a sewage heat exchanger, a seawater heat exchanger, a constant-temperature seawater cellar and a culture workshop sewage discharge system, wherein the mariculture sewage source heat pump secondary refrigerant unit comprises a unit sewage outlet, a unit cold side secondary refrigerant inlet, a unit hot side secondary refrigerant outlet, a unit hot side secondary refrigerant inlet, a unit seawater inlet and a unit seawater outlet, the unit sewage inlet is connected with the culture workshop sewage discharge system through a sewage pump, the unit sewage outlet is connected with the sewage cellar, the unit cold side secondary refrigerant outlet is connected with the sewage heat exchanger inlet, the sewage heat exchanger outlet is connected with the sewage secondary refrigerant pump, the unit hot side secondary refrigerant outlet is connected with the seawater heat exchanger inlet, the outlet of the seawater heat exchanger is connected with a seawater coolant pump, the seawater inlet of the unit is connected with new seawater through a seawater pump, and the seawater outlet of the unit is connected with the constant-temperature seawater cellar.

Further, the mariculture sewage source heat pump secondary refrigerant unit comprises a preheating exchanger, a condenser, a refrigeration compressor, a liquid storage gas-liquid separator, an evaporator and a throttle valve, wherein an outlet of the refrigeration compressor is connected with a refrigerant inlet of the condenser, a refrigerant outlet of the condenser is connected with a liquid inlet of the liquid storage gas-liquid separator, a liquid outlet of the liquid storage gas-liquid separator is connected with the throttle valve, an outlet of the throttle valve is connected with a refrigerant inlet of the evaporator, an outlet of the evaporator is connected with a gas inlet of the liquid storage gas-liquid separator, and a gas outlet of the liquid storage gas-liquid separator is connected with an inlet of the refrigeration compressor.

Further, a sewage stirrer is arranged in the sewage cellar, and a seawater stirrer is arranged in the constant-temperature seawater cellar.

Furthermore, a sewage pump is arranged between the sewage inlet of the unit and a sewage discharge system of a breeding workshop, a sewage coolant pump is arranged between the outlet of the sewage heat exchanger and the cold-side coolant inlet of the unit, the seawater inlet of the unit is connected with fresh seawater through a seawater pump, and a seawater coolant pump is arranged between the outlet of the seawater heat exchanger and the hot-side coolant inlet of the unit.

Furthermore, a sewage heat exchanger is arranged in the sewage cellar, a seawater heat exchanger is arranged in the constant-temperature seawater cellar, the sewage heat exchanger and the seawater heat exchanger are both immersion type non-metal heat exchangers, and a secondary refrigerant flow channel of the immersion type non-metal heat exchanger is circular.

Further, the condenser and the evaporator are both plate heat exchangers.

Furthermore, the outlet of the sewage coolant pump is connected in parallel through a valve S5 and a valve S6 and then is connected with the cold-side coolant inlet of the unit and the hot-side coolant inlet of the marine aquaculture sewage source heat pump coolant unit respectively in two ways, the cold-side coolant outlet of the unit of the marine aquaculture sewage source heat pump coolant unit is connected with the sewage heat exchanger through two ways of valves S2 and S3 in parallel, the outlet of the seawater coolant pump is connected in parallel through a valve S7 and a valve S8 and then is connected with the hot-side coolant inlet of the marine aquaculture sewage source heat pump coolant unit and the cold-side coolant inlet of the unit in two ways, and the cold-side coolant outlet of the unit and the hot-side coolant outlet of the unit are connected with the inlet of the seawater heat exchanger through two ways of valves S1 and S4 in parallel.

The utility model discloses have high energy efficiency than and very good anti seawater corrosion's performance, can be according to the living temperature range of different mariculture living beings, and the most suitable temperature range of growing, the mariculture sewage source heat pump secondary refrigerant unit of customization out any specification, cooperation mariculture sewage source site conditions plans whole system scheme, extensively for the mariculture industry, provides diversified sea water accuse temperature technical solution, supplies mariculture long-term the use.

The seawater temperature suitable for the growth of the turbot is taken as an example to set the seawater temperature produced by the utility model. In winter, in the Bohai sea Liaoning calabash island sea area, the temperature of the seawater in nature begins to be reduced to 15-14 ℃ in 12 months, and generally reaches 7-8 ℃ in about 1 month when the temperature of the seawater in the middle and last ten days of 2 months is 12-10 ℃, the lowest temperature appears in 3 months, the temperature is continuously reduced in 4 months, the temperature gradually rises in 5 months, and the temperature is higher than 12 ℃ in the beginning of 6 months. According to the life habit of the turbot, the utility model is started when the normal temperature fresh seawater is reduced to be close to 12-10 ℃. Set up the utility model discloses the operating condition of heating in winter closes the summer valve, opens the winter valve, moves 6 months from 2 months middle ten days, amounts to nearly 4 ~ 5 months time. The temperature is kept between 12 ℃ and 15 ℃ along with the fluctuation of the temperature of the seawater between 12 ℃ and 7 ℃ to 12 ℃, namely the constant-temperature hot seawater. In summer, in the Bohai sea Liaoning calabash island sea area, the temperature of the seawater in nature begins to rise to 18-19 ℃ in the middle and late 8 months, the highest temperature appears in 9 months, generally at 21-23 ℃, the temperature is continuously high, the temperature begins to fall from 22-21 ℃ in 10 months, and the temperature begins to fall below 18 ℃ in about 11 middle and ten days. According to the life habit of the turbot, the utility model is started when the fresh seawater at normal temperature rises to approximately 18-19 ℃. Set up the utility model discloses the operation refrigeration operating mode in summer closes the valve in winter, opens the valve in summer, and it is first from 8 middle ten days in the month to operate 11 months, nearly 4 ~ 5 months time. The temperature is kept between 15 ℃ and 18 ℃ to 15 ℃ along with the fluctuation of the temperature of the seawater between 18 ℃ and 23 ℃ to 18 ℃, namely the seawater is cooled at constant temperature.

The utility model discloses the technical problem who solves:

1. maximum utilization of the source of sewage. A reasonable sewage recovery and waste heat conversion system for mariculture discharge is built, 100% of sewage is completely recovered, energy is efficiently converted, and water (sewage quantity) and heat (energy) are not lost.

The source of the seawater culture sewage is abundant, on one hand, the sewage comes from daily water change of a seawater culture workshop, namely, the sewage overflows through the water level control of new seawater supplemented by long running water, and the total water change amount is large but the water flow is slow; on the other hand, sewage is generated by cleaning the whole culture pond of the culture workshop and changing water, namely, sewage and dirt at the bottom of the pond are discharged through vortex flow generated by scraping and cleaning, and the total water changing amount is large while the water flow is large. It can be seen that the energy of the mariculture sewage source comes from the energy of the waste seawater for aquaculture discharged from the mariculture plant.

Use the utility model discloses the constant temperature mariculture of production, like winter, certain normal atmospheric temperature sea well water that newly beats is 8 ℃, warp the utility model discloses directly heat and carry out the temperature, produce 14.5 ℃ constant temperature sea water, pour into and breed the pond, breed the pond sea water temperature in the pond promptly and be 14.5 ℃, in order to keep breeding the pond temperature invariant in, need incessantly supply in the pond for breeding the utility model discloses the 14.5 ℃ sea water constant temperature of production, because water level control, breed the pond then can produce the overflow, then overflow water temperature is sewage source temperature and is 14.5 ℃; in addition, when the culture pond is cleaned, the temperature of the culture constant-temperature water in the discharge pond, namely the temperature of the sewage source, is 14.5 ℃.

For a small farm, for example, 30 farms with a water holding volume of 6.5m 0.3m, assuming an estimated volume of waste per day swept discharge of m1=30 6.5m 0.3m 1.2=456m³D =, if the water supply amount of the cultivation workshop is 30 m³H, the overflow amount is 30 m³The overflowing sewage quantity of the 30 culture ponds per day is estimated to be m2=30 x 30=900 m³And d. The total sewage discharge amount of the aquaculture workshop is m1+ m2=1356 m³And/d =1356 tons/d, and the amount of sewage discharged by the cultivation workshop per hour is about m =70 tons/h.

The utility model discloses, heat normal atmospheric temperature new sea well water 8 ℃ to 14.5 ℃ in winter, heat 70 tons of sea water per hour and need heat Q2

Q2 Δ t =1 Δ 70 & (14.5-8) ° C =455000kcal (= 529 kW. h)

Wherein: c-specific heat capacity of Heat transfer Medium kcal/kg deg.C

mass kg of m-heat exchange medium

t-temperature of the heat transfer medium ℃

If the effluent from the mariculture is discharged, there is no loss of flow, no loss of temperature,

in winter, sewage at 14.5 ℃ is discharged and recycled from a mariculture workshop, the temperature of the waste sewage is reduced to 6 ℃ after heat extraction, and the heat quantity extracted from 70 tons of sewage per hour is Q1

Q1= cm∆t =1*70*1000*（14.5-6.0）=595000kcal=691kW •h

Then Q1 is more than Q2, and the heat of the visible sewage source can ensure the normal operation of the utility model.

If the sewage is discharged from the marine culture, the flow loss is 20%, that is, the sewage amount is 70 x 80% =56 tons, and the temperature loss is 1.5 ℃, that is, the sewage at 13 ℃ is discharged and recovered from the marine culture workshop, and the temperature of the waste sewage after heat extraction is reduced to 6 ℃, and the heat quantity extracted from 56 tons of sewage per hour is Q1 ″

Q1＇= cm＇∆t＇=1*56*1000*（13-6）=392000kcal=456kW •h

As can be seen, Q1' is less than Q2, and the waste heat of the sewage is not enough for heating the seawater at low temperature.

From the above data analysis, the design of the system should ensure that the sewage discharged from the mariculture can not lose the amount and heat. The technical measure is to set a heat-preserving and heat-insulating sewage cellar and recover sewage discharged by the fishpond to the maximum capacity.

Use the utility model discloses the constant temperature mariculture of production, cool down the sea water summer, heat up the sea water winter, the marine water for breed can be invariable throughout the year living at the organism that suits mariculture, the temperature of growth, replace original mode of relying on large-traffic nature mariculture temperature regulation, can practice thrift original breed water use amount, the original cistern volume of holding the sea water of mariculture owner is big, usable its transformation is sewage cellar for storing things and constant temperature sea cellar for storing things, no longer need build secret sewage cellar for storing things specially in addition, resources for saving land.

2. The utility model discloses a power consumption design need refer to the transformer quota of sea water plant, and the power consumption of limited system needs to accomplish the input of low electric work, and high energy output realizes high energy efficiency ratio promptly.

Based on this realistic problem, the utility model discloses heat transfer process: firstly, sewage and seawater are adopted for heat exchange due to the existence of temperature difference, then secondary refrigerant and sewage are utilized for heat exchange due to the existence of design temperature difference, and secondary refrigerant and seawater are utilized for heat exchange due to the existence of design temperature difference. Then, 20% of electric power consumed by the operation of the heat pump refrigeration system enables the refrigeration system to circulate, the refrigerant exchanges heat with the secondary refrigerant, the secondary refrigerant of the heat source is cooled, the secondary refrigerant of the cold source is heated, and the secondary refrigerant and the electric energy generated by the compensation operation of the heat pump are converted into the energy of the secondary refrigerant together, so that the law of thermodynamics is met. Thus, the energy efficiency ratio of the conversion of the whole energy is high.

3. All related heat exchangers related to sewage/seawater need to have high reliability, have strong seawater corrosion resistance, and guarantee the service life of the utility model.

If the heat pump unit directly introduces seawater to the condenser and the evaporator for heat exchange, the two devices need to be made of special seawater corrosion prevention materials. At present, the technology of domestic anticorrosion heat exchangers, which are better metal heat exchangers for seawater anticorrosion, is a titanium tube heat exchanger and a stainless steel (chrome-nickel steel) plate heat exchanger. Compared with the cost, the plate heat exchanger has more advantages than the titanium tube heat exchanger; compared with the overall dimension, the plate heat exchanger has small volume and flexible operation, and can effectively reduce the overall dimension of the whole unit; furthermore, the plate heat exchanger has certain corrosion resistance advantage compared with a copper tube heat exchanger. The plate heat exchanger has the defects that the structural design is to enhance the heat exchange effect, the distance between the plates is small, the plates are easily blocked by microorganisms or silt contained in a heat exchange medium, and the plates need to be cleaned and replaced at irregular intervals. Because the condenser and the evaporator are connected through a plurality of pipelines and the replacement process is complex, the design of the unit is considered, seawater is not directly introduced into the condenser and the evaporator, and a refrigerant and secondary refrigerant heat exchange mode is adopted to replace the refrigerant and seawater heat exchange, so that the reliability of the plate heat exchanger is greatly improved, and the service life of the unit is greatly prolonged.

In order to improve the effect of converting the waste heat of the sewage, the heat pump unit of the utility model is provided with a preheating exchanger which has the functions of preheating and exchanging the fresh seawater at normal temperature and the sewage discharged by the fishpond, and adopts a plate heat exchanger to enhance the corrosion resistance of the plate heat exchanger to the seawater, so that the plate heat exchanger is convenient to clean and replace because the plate heat exchanger is not connected with a refrigerating system of the heat pump unit; in addition, the non-metal heat exchanger is made of composite non-metal materials, and is characterized in that the nano heat conduction material is added in the manufacturing process of the non-metal heat exchange plate, so that the heat transfer coefficient of the non-metal material is increased, and the heat exchange quantity of the non-metal heat exchanger is enhanced; the non-metal heat exchanger has strong bearing capacity and is made of high-strength non-metal materials. By adopting the nonmetal heat exchanger, the unit module heat exchange plate assembly can be flexibly combined according to the size of the required heat exchange area, has light weight, convenient field assembly and disassembly, is easy to clean, and can prevent blockage, prevent freezing, resist corrosion and resist microorganisms. Because the circulation volume of constant temperature seawater and sewage is large, a sewage cellar and a constant temperature cellar are required to be built for energy storage and water storage, a sewage heat exchanger and a seawater heat exchanger of non-metal heat exchanger types are selected and soaked in the sewage cellar and the constant temperature cellar respectively, and seawater secondary refrigerant and sewage secondary refrigerant continuously flow in the non-metal heat exchanger to exchange heat with seawater/sewage at constant temperature.

4. Effective measures are taken to improve the heat exchange performance of the nonmetal heat exchanger with seawater and sewage. In the sewage cellar, the states of hot sewage and cold sewage layering and uneven temperature are common, and a sewage stirrer is arranged in the sewage cellar, so that the states of cold and hot layering and uneven temperature on the upper surface and the lower surface of the water in the cellar can be uniform, the heat exchange effect of the sewage and secondary refrigerant in a sewage heat exchanger is enhanced, and the waste heat of the sewage is more fully recovered; in a similar way, a seawater stirrer is arranged in the constant-temperature seawater cellar, so that the heat exchange between seawater used for cultivation and a seawater secondary refrigerant is more sufficient.

The utility model has the advantages and effects that:

1. clean energy: the utility model belongs to sewage source heat pump, the small amount of electric work of the compressor compensation operation consumption that only relates to water pump and heat pump set in the device accords with the requirement of the energy saving and emission reduction's novel environmental protection product that the country advocated, is the clean type energy.

2. One set of device can realize raising the temperature of normal-temperature new sea well water in winter and freely switching for cooling the normal-temperature new sea well water in summer by setting a path for switching the sewage secondary refrigerant and the sea water secondary refrigerant to enter the heat pump heat exchanger through a valve, thereby producing constant-temperature water.

3. The sewage source waste heat is recycled step by step and the energy comprehensive utilization rate is high: the utility model discloses the waste heat that utilizes the sewage of retrieving mariculture pond emission adopts second grade waste heat recovery system as the energy, and wherein the heat energy of waste heat recovery conversion accounts for the utility model discloses the heating volume/refrigerating output 95% of making compares with ordinary water source heat pump, has higher energy conversion value, more practices thrift the natural water resource.

4. High energy efficiency ratio: the waste heat of sewage discharged by mariculture, the first-stage heat recovery adopts a high-efficiency plate heat exchanger to exchange heat with sewage-seawater due to large temperature difference without consuming electric power, the second-stage heat recovery of sewage adopts a soaking type non-metal heat exchanger to exchange heat with sewage secondary refrigerant-sewage and seawater secondary refrigerant-seawater due to large temperature difference without consuming electric power, two heat energies generate 100 percent of energy together, a seawater culture sewage source heat pump secondary refrigerant unit host selects a refrigeration compressor of the most advanced manufacturing technology in the world, the power of the motor is small, the compensation utility model operates to regulate the temperature of the sewage secondary refrigerant and the seawater secondary refrigerant, namely, the heat source secondary refrigerant is heated, the heat source secondary refrigerant is cooled, 4.97 percent of energy is consumed, the purpose of regulating the temperature of the seawater is achieved, and the heat conversion efficiency performance which can not be surpassed by other gas boilers and electric boilers is achieved.

5. High seawater corrosion resistance: the utility model relates to a have with the sea water and preheat interchanger, sea water heat exchanger and sewage heat exchanger of carrying out the heat exchange, wherein preheat the plate heat exchanger that the interchanger adopted chromium nickel steel material, sea water heat exchanger, sewage heat exchanger adopt to have purpose-built non-metallic heat exchanger, and heat pump set condenser, evaporimeter and secondary refrigerant carry out the plate heat exchanger that the heat exchange also adopted chromium nickel steel material simultaneously, so the utility model discloses have high anti sea water corrosion resistance ability, increased the utility model discloses a reliability and running life have reduced the cost of maintenance that causes because of the heat exchanger among the sea water corrosion frequent change system.

6. The utility model discloses a sewage source heat pump secondary refrigerant unit's low in manufacturing cost. Because the secondary refrigerant system is adopted to exchange heat with the unit refrigerating system, the condenser and the evaporator of the unit adopt plate heat exchangers popular in the market to replace corrosion-resistant titanium tube heat exchangers, and the manufacturing cost of the heat pump unit is greatly reduced.

7. The utility model discloses a sewage source heat pump set compact structure, area is little. The main machine of the unit adopts a vertical compressor, and the heat exchanger adopts a plate heat exchanger, so that the whole machine has a compact internal structure, small overall dimension and small occupied area.

8. The utility model discloses can realize from using control, through gathering temperature, water pressure, discharge, refrigerant temperature, refrigerant pressure, refrigerant flow, signals such as secondary refrigerant temperature, secondary refrigerant pressure, show, analysis, warning, regulation and control system's operation.

9. The conversion of scientific and technological achievements is facilitated: the utility model discloses an use, be convenient for reform transform at original mariculture shed family place scene: the middle of the existing normal-temperature new sea cistern (high-level cistern) is separated, one side of the existing normal-temperature new sea cistern is used as a sewage cistern to recover and store sewage, and heat exchange is carried out between the sewage and a sewage secondary refrigerant through a non-metal heat exchanger; the other side is used as a constant-temperature seawater cellar, heat exchange is carried out through the nonmetal heat exchanger and the seawater secondary refrigerant, constant-temperature seawater is produced and stored, infrastructure is not increased, engineering development is not limited by a site, and the constant-temperature seawater cellar is easy to popularize.

10. The seawater culture industry is promoted to develop towards science and technology modernization: the utility model discloses change the mode that mariculture excessively relies on natural environment artificial breeding, drive the mariculture owner and walk out and cross low because of the nature sea water winter temperature, the predicament that the summer high temperature caused does not receive the temperature restriction of breeding the water, drives the mariculture industry and breeds the development to the pluralism of many varieties.

Drawings

FIG. 1 is a schematic diagram of a seawater culture sewage source heat pump secondary refrigerant constant temperature cold and hot seawater system

FIG. 2 is a schematic diagram of a seawater culture sewage source heat pump coolant constant temperature cold and hot seawater system unit;

FIG. 3 is a schematic diagram of conversion of cold-hot secondary refrigerant valves of a seawater culture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system winter machine room unit;

FIG. 4 is a schematic diagram of cold-hot secondary refrigerant valve switching of a seawater culture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system summer machine room unit.

The components in the figure: 1. A mariculture sewage source heat pump secondary refrigerant unit; 2. a sewage coolant pump; 3. a sewage pump; 4. a sewage cellar; 5. a sewage heat exchanger; 6. a sewage agitator; 7. a seawater agitator; 8. a seawater heat exchanger; 9. a constant-temperature sea water cellar; 10. a sea water pump; 11. a seawater coolant pump; 12. a constant-temperature water system for a cultivation workshop; 13. a breeding workshop; 14. a sewage discharge system of the cultivation workshop; 15. a preheat exchanger; 16. a condenser; 17. a refrigeration compressor; 18. a liquid storage gas-liquid separator; 19. an evaporator; 20. a throttle valve; 21. a box body; 22. a unit sewage inlet; 23. a unit sewage outlet; 24. a cold-side refrigerating medium outlet of the unit; 25. a unit cold side cold-carrying agent inlet; 26. a unit hot side secondary refrigerant outlet; 27. a unit hot side secondary refrigerant inlet; 28. a unit seawater inlet; 29. and (4) a seawater outlet of the unit.

In fig. 2, a is a high-temperature-side refrigerant, B is a low-temperature-side refrigerant, C is a hot-side coolant, and D is a cold-side coolant. In FIG. 3, A, A1 is a sewage coolant and B, B1 is a seawater coolant. In fig. 4, A, A1 is a sewage coolant and B, B1 is a seawater coolant.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

A mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system comprises a mariculture sewage source heat pump secondary refrigerant unit, a secondary refrigerant system, a sewage system and a constant-temperature seawater system, wherein the mariculture sewage source heat pump secondary refrigerant unit 1 comprises: the system comprises a preheating exchanger 15, a condenser 16, a refrigeration compressor 17, a liquid storage gas-liquid separator 18, an evaporator 19 and a throttle valve 20, wherein an outlet of the refrigeration compressor 17 is connected with a refrigerant inlet of the condenser 16, a refrigerant outlet of the condenser 16 is connected with a liquid inlet of the liquid storage gas-liquid separator 18, a liquid outlet of the liquid storage gas-liquid separator 18 is connected with the throttle valve 20, an outlet of the throttle valve 20 is connected with a refrigerant inlet of the evaporator 19, a refrigerant outlet of the evaporator 19 is connected with a gas inlet of the liquid storage gas-liquid separator 18, and a gas outlet of the liquid storage gas-liquid separator 18 is connected with an inlet of the refrigeration compressor. The seawater inlet 28 of the preheating exchanger is connected with the seawater pump 10, the seawater outlet 29 of the preheating exchanger is connected with the seawater inlet of the constant-temperature seawater cellar 9, the sewage inlet 22 of the preheating exchanger is connected with the sewage pump 3, and the sewage outlet 23 of the preheating exchanger is connected with the sewage inlet of the sewage cellar 4. The sewage system comprises a breeding workshop sewage discharge system, a sewage pump 3, a preheating exchanger 15, a sewage cellar 4, a sewage stirrer 6, a waste sewage discharge system and the like, and the secondary refrigerant system comprises a sewage secondary refrigerant pump 2, a sewage heat exchanger 5, a seawater secondary refrigerant pump 11, a seawater heat exchanger 8, a condenser 16 secondary refrigerant side and an evaporator 19 secondary refrigerant side. The constant-temperature seawater system comprises a seawater pump 10, a preheating exchanger 15, a constant-temperature seawater cellar 9, a seawater stirrer 7, a constant-temperature seawater system 12 for cultivation and the like. The outlet of the sewage heat exchanger 5 is connected with the sewage coolant-carrying pump 2; the outlet of the seawater heat exchanger 8 is connected with a seawater coolant pump 11, and the unit cold-side coolant outlet 24 is connected with the sewage heat exchanger 5 through a valve S2; the heat exchanger is connected with the seawater heat exchanger 8 in parallel through a valve S1, and the cold-carrying medium outlet 26 at the hot side of the unit is connected with the seawater heat exchanger 8 through a valve S4; the sewage heat exchanger 5 is connected with a valve S3, and the outlet of the sewage heat exchanger 5 is connected with a sewage coolant pump 2; the outlet of the seawater heat exchanger 8 is connected with a seawater coolant pump 11, the seawater inlet 28 of the unit is connected with a seawater pump 10, and the sewage coolant pump 2 is connected with the coolant inlet 25 of the cold-side evaporator of the unit through a valve S6; the seawater coolant pump 11 is connected with the unit hot side cold carrier inlet 27 through a valve S5 in parallel, and simultaneously is connected with the unit hot side cold carrier inlet 27 through a valve S8; the device is connected with a cold side evaporator secondary refrigerant inlet 25 of the unit in parallel through a valve S7, a sewage inlet 22 of the unit is connected with a sewage discharge system 14 of a breeding workshop through a sewage pump 3, a sewage outlet 23 of the unit is connected with a sewage cellar 4, a seawater inlet 28 of the unit is connected with a seawater pump 10, a seawater outlet 29 of the unit is connected with a constant temperature seawater cellar 9, and a constant temperature seawater outlet of the constant temperature seawater cellar 9 is connected with a constant temperature seawater system 12 for breeding.

Heating the seawater in winter: and closing a valve S5, connecting an outlet of the sewage coolant pump 2 with an inlet 25 of the unit cold-side evaporator coolant through S6, closing a valve S1, connecting an outlet 24 of the unit cold-side evaporator coolant with an inlet of the sewage heat exchanger 5 through a valve S2, closing a valve S7, connecting an outlet 11 of the seawater coolant pump 11 with an inlet 27 of the unit hot-side condenser coolant through a valve S8, and closing a valve S3, and connecting an outlet 26 of the unit hot-side condenser coolant with an inlet of the seawater heat exchanger 8 through a valve S4. Cooling the seawater in summer: and closing a valve S8, connecting an outlet of the seawater coolant pump 11 with a cold-medium inlet 25 of the unit cold-side evaporator through a valve S7, closing a valve S2, connecting a cold-medium outlet 24 of the unit cold-side evaporator with an inlet of the seawater heat exchanger 8 through a valve S1, closing a valve S6, connecting an outlet of the sewage coolant pump 2 with a cold-medium inlet 27 of the unit hot-side condenser through a valve S5, and closing a valve S4, and connecting an outlet 26 of the unit hot-side condenser cold-medium with an inlet of the sewage heat exchanger 5 through a valve S3. Namely, the set of constant temperature system has two functions, and the set of unit is realized by the connection mode of the secondary refrigerant after the conversion of the seawater secondary refrigerant pump and the sewage secondary refrigerant pump and the unit heat exchanger: in winter, the sewage secondary refrigerant is a heat source of a cold-side evaporator of the unit, the seawater secondary refrigerant is a cold source of a hot-side condenser of the unit, a low-grade heat source is converted into a high-grade heat source, the seawater secondary refrigerant obtains energy improvement, and the seawater in the constant-temperature seawater cellar is heated due to temperature difference; in summer, the sewage secondary refrigerant is a cold source of a condenser at the hot side of the unit, and the seawater secondary refrigerant is a heat source of an evaporator at the cold side of the unit, so that the refrigerant is evaporated to release energy, and the seawater secondary refrigerant is cooled and refrigerates the seawater in the constant-temperature seawater cellar due to temperature difference.

The waste heat of the sewage discharged by the mariculture workshop is recovered by two heat exchanges and is extracted step by step, and the first heat recovery is carried out in the preheating exchanger 15 by heat exchange with new seawater due to temperature difference; the second heat recovery of the sewage is that heat exchange is carried out between the sewage and the sewage secondary refrigerant in the sewage heat exchanger 5 in the sewage cellar 4 due to temperature difference, the recovery of the sewage waste heat is complete, and no power consumption and energy conservation are realized in the heat exchange process. The new seawater is thermostatted step by step twice, the first thermostatted new seawater is in the preheating exchanger 15, and exchanges heat with the sewage discharged from the mariculture workshop due to temperature difference; the seawater is kept at constant temperature for the second time in the constant-temperature seawater cellar 9 and exchanges heat with the seawater secondary refrigerant in the seawater heat exchanger 8 due to temperature difference, and the heat exchange process has no power consumption and saves energy.

A sewage stirrer 6 and a seawater stirrer 7 are arranged in the sewage cellar 4 and the constant-temperature seawater cellar 9, so that the states of upper and lower cold and hot layering and uneven temperature of a sewage surface in the sewage cellar 4 and a seawater surface in the constant-temperature seawater cellar 9 are changed, the heat exchange effect of the sewage and a secondary refrigerant in the sewage heat exchanger 5 and the heat exchange effect of the seawater and the secondary refrigerant in the seawater heat exchanger 8 are enhanced, the waste heat of the sewage is completely recovered, and the seawater is stabilized to a set temperature at a constant temperature.

The sewage heat exchanger 5 and the sea water heat exchanger 8 of settling in sewage cellar and the constant temperature sea water cellar are soaking formula non-metal heat exchanger, do not corrode, the microorganism, its non-metal material adds microelement, strengthen its heat conductivility, soaking formula non-metal heat exchanger's secondary refrigerant runner design is circular, it is big than dull and stereotyped heat exchanger heat transfer area, and simultaneously, this non-metal material's connecting piece etc. is the strenghthened type, and intensity is good, and the pressure-bearing is high, non-metal heat exchanger's heat transfer module unit can be according to required heat transfer area, the field assembly concatenation, and easy operation is nimble, can dismantle, easily clear up. The internal tube pass of the non-metal heat exchanger is the flow of secondary refrigerant, and the whole structure of the non-metal heat exchanger is soaked in sewage, namely waste seawater and constant-temperature seawater, so that the non-metal heat exchanger has the functions of seawater corrosion resistance, high efficiency and heat exchange efficiency in the same process and heat storage.

The condenser 16 and the evaporator 19 in the unit adopt plate heat exchangers, heat exchange between the refrigerant and two paths of secondary refrigerants is realized, seawater does not need to be directly contacted, special corrosion prevention treatment is not needed, a titanium tube heat exchanger is replaced, the manufacturing cost of the unit is reduced, meanwhile, the plate heat exchanger has higher corrosion resistance than a common copper tube heat exchanger, the after-sales maintenance cost is reduced, the service life of the main heat exchanger of the unit is prolonged, and the reliability of the unit is enhanced.

Constant temperature mariculture, the sea water cooling in summer, the sea water intensifies winter, the temperature that the organism that breeds with the sea water can be invariable throughout the year in suitable mariculture survives, grows replaces the original mode that relies on large-traffic natural mariculture to adjust the temperature, can practice thrift and breed the water use, the original cistern volume of holding the sea water of mariculture owner is big, usable transformation is sewage cellar 4 and constant temperature sea water cellar 9, no longer need to build secret sewage cellar in addition specially, resources on the saving land.

The utility model discloses can realize from using control, through gathering temperature, water pressure, discharge, refrigerant temperature, refrigerant pressure, refrigerant flow, signals such as secondary refrigerant temperature, secondary refrigerant pressure, show, analysis, warning, regulation and control system's operation.

Example 1

The utility model relates to a mariculture sewage source heat pump secondary refrigerant is cold/hot water system for constant temperature belongs to clean energy technical field, the system includes mariculture sewage source heat pump secondary refrigerant unit, secondary refrigerant system, sewage system, constant temperature sea water system. The system fishpond discharge system 14 is characterized in that sewage is connected with a sewage inlet 22 of a preheating exchanger 15 of the mariculture sewage source heat pump secondary refrigerant unit 1 through a sewage pump 3, a sewage outlet 23 of the preheating exchanger 15 is connected with an inlet of a sewage cellar 4, and an outlet of the sewage cellar 4 is connected with a sewage drainage ditch; an outlet of a sewage heat exchanger 5 in the sewage cellar 4 is connected with an inlet of a sewage coolant-carrying pump 2, an outlet of the sewage coolant-carrying pump 2 is connected with the unit 1 in two paths after being connected in parallel through a valve S5 and a valve S6, and the sewage coolant-carrying agent is connected with an inlet of the sewage heat exchanger 5 after coming out of two paths of parallel valves S2 and a valve S3 of the unit 1; the normal-temperature fresh sea well water is connected with a unit sea water inlet 28 of a preheating exchanger 15 through a sea water pump 10, a unit sea water outlet 29 of the preheating exchanger 15 is connected with an inlet of a constant-temperature sea water cellar 9, and an outlet of the constant-temperature sea water cellar 9 is connected with a fishpond 13; the outlet of the seawater heat exchanger 8 in the constant-temperature seawater cellar 9 is connected with a seawater coolant pump 11, the outlet of the seawater coolant pump 11 is connected with the unit 1 in two paths after being connected in parallel through a valve S7 and a valve S8 of the unit 1, and the seawater coolant is connected with the inlet of the seawater heat exchanger 8 after coming out of the two paths of parallel valves S1 and a valve S4 of the unit 1.

Connection of a refrigeration system of the mariculture sewage source heat pump secondary refrigerant unit 1: a gas outlet of a refrigeration compressor 17 of the unit 1 is connected with a refrigerant gas inlet of a condenser 16, a refrigerant liquid outlet of the condenser 16 is connected with a liquid inlet of a liquid storage gas-liquid exchanger 18, a liquid outlet of the liquid storage gas-liquid exchanger 18 is connected with an inlet of a throttle valve 20, an outlet of the throttle valve 20 is connected with a refrigerant liquid inlet of an evaporator 19, and a refrigerant gas outlet of the evaporator 19 is connected with a gas inlet of the refrigerant compressor.

The utility model discloses heating the operating mode operation winter, when producing the hot sea water of constant temperature, closing computer lab unit valve: s7, S1, S5 and S3. The sewage coolant pump 2 is connected with a coolant inlet of an evaporator 19 of the unit 1 through a valve S6 passage, a coolant outlet of the evaporator 19 is connected with an inlet of a sewage heat exchanger seawater coolant generator unit 5 through a valve S2 passage, and an outlet of the sewage heat exchanger 5 is connected with an inlet of the sewage coolant pump 2; the seawater coolant pump 11 is connected with a coolant inlet of a condenser 16 of the unit 1 through a valve S8 passage, a coolant outlet of the condenser 16 is connected with an inlet of a seawater heat exchanger 8 through a valve S4 passage, and an outlet of the seawater heat exchanger 8 is connected with an inlet of the seawater coolant pump 11.

The utility model discloses in the operation of summer refrigeration operating mode, during the cold sea water of production constant temperature, close computer lab unit valve S8, S2, S6, S4. The seawater coolant pump 11 is connected with a coolant inlet of an evaporator 19 at the cold side of the unit 1 through a valve S7 passage, a coolant outlet of the evaporator 19 is connected with an inlet of a seawater heat exchanger 8 through a valve S1 passage, and an outlet of the seawater heat exchanger 8 is connected with the seawater coolant pump 11; the sewage coolant pump 2 is connected with a coolant inlet of a condenser 16 at the hot side of the unit 1 through a valve S5 passage, a coolant outlet of the condenser 16 is connected with an inlet of a sewage heat exchanger 5 through a valve S3 passage, and an outlet of the sewage heat exchanger 5 is connected with an inlet of the sewage coolant pump 2.

Description of the working process:

the utility model relates to a mariculture sewage source heat pump secondary refrigerant cold/hot seawater system of constant temperature, the system includes mariculture sewage source heat pump secondary refrigerant unit, secondary refrigerant system, sewage system, constant temperature seawater system. Taking the seawater temperature of 12-18 ℃ for the growth of the turbot in the marine culture as an example, the seawater temperature produced by the utility model is set, if the refrigerant is R32, data points are collected, in winter, the condensation temperature is 30 ℃, the evaporation temperature is-6 ℃, the normal temperature new seawater temperature is 8.2 ℃, the production constant temperature hot seawater is 14.5 ℃, the hot sewage discharged by a fish culture workshop is 14.5 ℃, and the cold sewage is 6.1 ℃; in summer, the temperature of the new sea well water is 22.5 ℃ at normal temperature, the cold sea water with constant production temperature is 16.2 ℃, the cold sewage discharged by a breeding workshop is 16.2 ℃, and the hot sewage is 24.5 ℃. In summer, the condensation temperature is 35 ℃, the evaporation temperature is-1 ℃, the normal-temperature fresh sea well water temperature is 22.5 ℃, the production constant-temperature hot sea water is 14.5 ℃, the hot sewage discharged by a fish culture workshop is 14.5 ℃, and the hot sewage is 24 ℃.

Description of winter working Process

In winter, the temperature of the fresh sea well water at normal temperature (such as 8.2 ℃) and the temperature of the hot seawater at constant production temperature (such as 14.5 ℃) are equal to the temperature of the hot sewage discharged by a mariculture workshop (such as 14.5 ℃). 14.5 ℃ of sewage discharged by the discharge system 14 of the mariculture workshop is connected with a sewage inlet of the preheating exchanger 15 through the sewage pump 3, meanwhile, 8.2 ℃ of new sea well water is connected with a seawater inlet of the preheating exchanger 15 through the seawater pump 10, the sewage and the seawater continuously flow in the preheating exchanger 15, and water-water exchange heat due to the temperature difference: the sewage temperature is high, the heat release is reduced to medium-temperature sewage (such as 11.5 ℃), the new sea well water temperature is low, the heat absorption is increased to medium-temperature sea water (such as 10.2 ℃), the sewage outlet of the preheating exchanger 15 is connected with the sewage cellar 4, the medium-temperature sewage is introduced into the sewage cellar 4, the sea water outlet of the preheating exchanger 15 is connected with the constant-temperature sea water cellar 9, and the medium-temperature sea water is introduced into the constant-temperature sea water cellar 9. The inlet of the seawater heat exchanger 8 in the constant-temperature seawater cellar 9 is connected with the high-temperature seawater secondary refrigerant (such as 25 ℃) at the outlet of the condenser 16 of the unit 1, the high-temperature seawater secondary refrigerant continuously flows in the seawater heat exchanger 8, meanwhile, the medium-temperature seawater (such as 10.2 ℃) in the constant-temperature seawater cellar 9 continuously works and fully flows under the seawater stirrer 7, cold and hot seawater are mixed and are not layered, the secondary refrigerant in the seawater heat exchanger 8 and the seawater outside the seawater heat exchanger 8 are subjected to heat exchange through the seawater heat exchanger 8 due to large temperature difference, and the water-secondary refrigerant is subjected to heat exchange: the seawater refrigerating medium has high temperature, releases heat to cool to low temperature seawater refrigerating medium (such as 16.5 ℃), has low temperature of medium temperature seawater, absorbs heat to constant temperature hot seawater (such as 14.5 ℃), and achieves the purpose of heating seawater, wherein the constant temperature hot seawater (such as 14.5 ℃) overflows (in a high-level cistern) and is connected with a constant temperature seawater system 12 for a mariculture workshop.

The inlet of the sewage heat exchanger 5 is connected with the sewage secondary refrigerant outlet of the evaporator 19 of the unit 1, the low-temperature sewage secondary refrigerant (such as-2 ℃) continuously flows in the sewage heat exchanger 5, meanwhile, the medium-temperature sewage (such as 11.5 ℃) in the sewage cellar 4 continuously and fully flows under the continuous work of the sewage stirrer 7, the cold and hot sewage in the sewage cellar 4 are mixed and are not layered, the sewage secondary refrigerant in the sewage heat exchanger 5 and the sewage outside the sewage heat exchanger 5 exchange heat in the sewage heat exchanger 5 due to large temperature difference, and water-secondary refrigerant carries out heat exchange in the sewage heat exchanger 5: the medium-temperature sewage is high in temperature, releases heat and reduces the temperature to low temperature (such as 6.1 ℃), namely, the sewage is cooled, the temperature of the sewage secondary refrigerant is low, absorbs heat and increases the temperature to the high-temperature secondary refrigerant (such as 4 ℃), and a heat source is provided for the sewage secondary refrigerant energy storage. Therefore, the temperature of the sewage discharged by the mariculture workshop is reduced from 14.5 ℃ of hot sewage to 6.1 ℃ of cold sewage, the waste heat of the sewage is recycled, and the energy is saved. The cold sewage (in the high-level cistern) overflows to a sewage ditch and is not used any more.

When the mariculture sewage source heat pump secondary refrigerant unit 1 works in winter: the sewage coolant-carrying pump 2 pumps high-temperature sewage coolant (such as 4 ℃) out of the sewage heat exchanger 5, the sewage coolant-carrying pump is connected with a coolant inlet of an evaporator 19 of the unit 1, low-temperature and low-pressure refrigerant liquid (such as-6 ℃) and high-temperature seawater coolant continuously flow in a shunt way, the refrigerant-coolant carries out heat exchange in the evaporator 19 due to large temperature difference through the evaporator 19, the high-temperature coolant has high temperature, releases heat and cools to the low-temperature coolant (such as-1.2 ℃), has low temperature, absorbs heat and heats to be evaporated to be refrigerant gas, a refrigerant gas outlet of the evaporator 19 is connected with a gas inlet of a liquid-storage gas-liquid separator 18, the liquid-storage gas-liquid separator 18 absorbs heat of the high-temperature refrigerant liquid and heats to be superheated refrigerant gas (such as 8 ℃), an outlet of the liquid-storage gas-liquid separator 18 is connected with an inlet of a refrigeration compressor 17, The low-temperature low-pressure refrigerant superheated gas in the refrigeration compressor 17 is compressed into high-temperature high-pressure refrigerant gas (the exhaust pressure is approximately 18.4bar of condensation pressure), the outlet of the refrigeration compressor 17 is connected with the refrigerant gas inlet of the condenser 16, the refrigerant gas in the condenser 16 continuously flows, meanwhile, low-temperature seawater secondary refrigerant (such as 20 ℃) also flows in the condenser 16, the secondary refrigerant-refrigerant exchanges heat in the condenser 16 due to large temperature difference, the refrigerant gas has high temperature, releases heat, is cooled and condensed into refrigerant liquid (such as 30 ℃) and has low temperature, absorbs heat and is heated into high-temperature seawater secondary refrigerant (such as 25 ℃), the secondary refrigerant outlet of the condenser 16 is connected with the inlet of a seawater heat exchanger 8 in a constant-temperature seawater cellar 9, and the high-temperature seawater secondary refrigerant (such as 25 ℃) carries heat and passes through the seawater heat exchanger 8, exchanging heat with seawater (such as 11.5 deg.C) in constant temperature seawater cellar to obtain constant temperature hot seawater (such as 14.5 deg.C); the refrigerant outlet of the condenser 16 is connected to the liquid inlet of the liquid-storage gas-liquid separator 18, the high-temperature refrigerant liquid (e.g. 30 ℃) in the liquid-storage gas-liquid separator 18 continuously flows in, and simultaneously, the low-temperature refrigerant gas (e.g. -6.0 ℃) introduced from the evaporator 19 also continuously flows in, and the high-temperature refrigerant liquid-the low-temperature refrigerant gas perform heat exchange in the liquid-storage gas-liquid separator 18 due to the large temperature difference: the temperature of the high-temperature refrigerant liquid is high, heat is released, the temperature is reduced to be super-cooled low-temperature refrigerant liquid (such as 25 ℃), and a liquid outlet of the liquid storage gas-liquid separator 18 is connected with an inlet of the throttle valve 20; the low-temperature refrigerant gas in the liquid storage gas-liquid separator 18 absorbs heat at low temperature and is heated to be overheated refrigerant gas (such as 8 ℃), the gas outlet of the liquid storage gas-liquid separator 18 is connected with the inlet of the refrigeration compressor 17, the overheated refrigerant gas enters the refrigeration compressor 17, the outlet of the throttle valve 20 is connected with the refrigerant inlet of the evaporator 19, the supercooled refrigerant liquid is throttled and reduced in pressure to evaporation pressure (such as 5.6 bar) and enters the evaporator 19, the high-temperature sewage secondary refrigerant is connected with the secondary refrigerant inlet of the evaporator 19 of the unit 1 through the sewage pump 2, the supercooled and throttled refrigerant liquid (such as minus 6.0 ℃) and the high-temperature sewage secondary refrigerant (such as 4 ℃) continuously flow and exchange heat through the evaporator due to large temperature difference, the refrigerant liquid absorbs heat and is evaporated to be refrigerant gas due to low temperature, the high-temperature sewage secondary refrigerant has high temperature and releases heat and is cooled to be the low-temperature sewage secondary refrigerant (such as minus 1.2 ℃), namely, the sewage secondary refrigerant is a heat source of the heat pump unit, so a refrigeration cycle process is completed, and a process of cooling the sewage secondary refrigerant is also completed, wherein a refrigerant outlet of an evaporator 19 of the unit 1 is connected with a gas inlet of a liquid storage gas-liquid separator 18, and the refrigeration cycle process is repeated; the secondary refrigerant outlet of the evaporator 19 is connected with the inlet of a sewage heat exchanger 5 in the sewage cellar 4, meanwhile, medium-temperature sewage (such as 11.5 ℃) continuously flows through the preheating exchanger 15 to enter the sewage cellar, exchanges heat with low-temperature sewage secondary refrigerant (such as-1.2 ℃) again due to temperature difference, continuously supplements heat for the sewage secondary refrigerant through the sewage heat exchanger 5, the sewage secondary refrigerant carries energy as the heat source of the heat energy unit 1 and enters the evaporator 19 again to repeatedly finish the heat exchange process, and therefore the system is guaranteed to prepare constant-temperature hot seawater from normal-temperature fresh seawater in winter.

Description of summer working Process

In summer, the temperature of the fresh sea well water at normal temperature (such as 22.5 ℃) and the temperature of the cold sea water at constant production temperature (such as 14.5 ℃) are the temperature of the hot sewage discharged by the mariculture workshop (such as 14.5 ℃). The sewage (for example 14.5 ℃) discharged by the discharging system 14 of the mariculture workshop is connected with the sewage inlet of the preheating exchanger 15 through the sewage pump 3, meanwhile, the new sea well water (for example 22.5 ℃) is connected with the seawater inlet of the preheating exchanger 15 through the seawater pump 10, two paths of sewage and seawater continuously flow in the preheating exchanger 15, and the water-water exchanges heat due to the temperature difference: the sewage temperature is low, the sewage absorbs heat and is heated to medium-temperature sewage (such as 19 ℃), the fresh sea well water temperature is high (such as 22.5 ℃), the heat is released and is cooled to medium-temperature sea water (such as 20 ℃), the sewage outlet of the preheating exchanger 15 is connected with the sewage cellar 4, the medium-temperature sewage is introduced into the sewage cellar 4, the sea water outlet of the preheating exchanger 15 is connected with the constant-temperature sea water cellar 9, and the medium-temperature sea water is introduced into the constant-temperature sea water cellar 9. An inlet of a seawater heat exchanger 8 in the constant-temperature seawater cellar is connected with a low-temperature seawater secondary refrigerant (such as 7 ℃) at an outlet of an evaporator 19 of the unit 1, the low-temperature seawater secondary refrigerant continuously enters the seawater heat exchanger 8, meanwhile, medium-temperature seawater (such as 20 ℃) in the constant-temperature seawater cellar 9 continuously and fully flows under the continuous work of a seawater stirrer 7, cold and hot seawater are mixed and are not layered, the low-temperature seawater secondary refrigerant in the seawater heat exchanger 8 and mixed seawater outside the seawater heat exchanger 8 are subjected to water-secondary refrigerant due to large temperature difference, and heat exchange is carried out through the seawater heat exchanger 8: the seawater coolant has low temperature, absorbs heat and heats to high temperature seawater coolant (such as 12 ℃), has high temperature of medium temperature seawater, releases heat and cools to constant temperature hot seawater (such as 14.5 ℃), achieves the purpose of cooling and refrigerating seawater, and therefore, the seawater coolant takes away the heat of seawater, is heated in the constant temperature seawater cellar 9 and is used as a heat source, and then returns to the evaporator 19 to absorb heat and evaporate the coolant, cools the seawater coolant, the seawater coolant repeats the above circulation process, and the overflow of the constant temperature hot seawater (such as 14.5 ℃) is connected with the constant temperature seawater system 12 of the mariculture workshop.

The inlet of the sewage heat exchanger 5 is connected with the sewage secondary refrigerant outlet of the condenser 19 of the unit 1, high-temperature sewage secondary refrigerant (such as 30 ℃) continuously flows out of the condenser 19 into the sewage heat exchanger 5, meanwhile, medium-temperature sewage (such as 19 ℃) in the sewage cellar 4 continuously and fully flows under the continuous work of the sewage stirrer 7, cold and hot sewage in the sewage cellar are mixed and are not layered, the sewage secondary refrigerant in the sewage heat exchanger 8 and mixed sewage outside the sewage heat exchanger 8 are subjected to heat exchange through the sewage heat exchanger 8 due to large temperature difference water-secondary refrigerant: the high-temperature sewage secondary refrigerant is high in temperature, releases heat and cools to low-temperature sewage secondary refrigerant (such as 24 ℃), the mixed sewage in the sewage cellar 4 is low in temperature, absorbs heat and heats to high-temperature sewage (such as 23 ℃), the sewage takes away the energy of the sewage secondary refrigerant, so that the sewage secondary refrigerant is cooled in the sewage cellar 4, the sewage discharged by the breeding workshop is heated from the temperature of cold sewage of 14.5 ℃ to the temperature of hot sewage of 23 ℃, and the hot sewage (in a high-level water cellar) overflows to a sewage ditch and is not utilized any more. The sewage agent pump 2 is connected with a secondary refrigerant inlet of a condenser 19 of the unit 1, low-temperature sewage secondary refrigerant (such as 24 ℃) continuously flows into the condenser 19 to be used as a cold source and then returns into the condenser 19 to cool the refrigerant in the condenser 16, and the sewage secondary refrigerant repeats the above cycle process.

When the mariculture sewage source heat pump secondary refrigerant unit 1 works in summer: the seawater coolant pump 11 is connected with a coolant inlet of an evaporator 19 of the unit 1, high-temperature seawater coolant (such as 12 ℃) is continuously introduced into the evaporator 19, meanwhile, throttled low-temperature low-pressure coolant liquid (such as-1 ℃) continuously flows to the evaporator 19, the high-temperature seawater coolant and the low-temperature low-pressure coolant liquid exchange heat in the evaporator 19 through the evaporator 19 due to large temperature difference, the high-temperature coolant has high temperature, releases heat and cools to the low-temperature coolant (such as 7 ℃) and has low temperature, absorbs heat and heats to be evaporated to refrigerant gas (such as-1 ℃), a coolant outlet of the evaporator 19 is connected with an inlet of a seawater heat exchanger 8 of a constant-temperature seawater cellar 9, the low-temperature seawater coolant (such as 7 ℃) carries cold energy and cools seawater (such as 20 ℃) in the constant-temperature seawater cellar 9, producing constant temperature cold seawater (such as 14.5 deg.C); the evaporator 19 is connected with the gas inlet of the liquid storage gas-liquid separator 18, the gas in the liquid storage gas-liquid separator 18 absorbs the heat of the high-temperature refrigerant liquid and heats the high-temperature refrigerant gas to be superheated refrigerant gas (such as 12 ℃), the outlet of the liquid storage gas-liquid separator 18 is connected with the inlet of the refrigeration compressor 17, the low-temperature low-pressure refrigerant superheated gas in the refrigeration compressor 17 is compressed to be refrigerant gas (80-100 ℃) with high temperature and high pressure (the exhaust pressure is approximate to the condensing pressure of 21 bar), the outlet of the refrigeration compressor 17 is connected with the refrigerant gas inlet of the condenser 16, the refrigerant gas in the condenser 16 continuously flows, meanwhile, the sewage secondary refrigerant pump 2 is connected with the secondary refrigerant inlet of the condenser 16, the low-temperature sewage secondary refrigerant (such as 24 ℃) is continuously pumped into the condenser 16, and the high-temperature high-pressure refrigerant gas and the low-temperature sewage secondary refrigerant are divided into two paths, the refrigerant continuously flows in the condenser 16, the secondary refrigerant-refrigerant exchanges heat in the condenser 16 due to large temperature difference, the gas temperature of the refrigerant is high, heat is released and cooled to be refrigerant liquid (such as 35 ℃) while the temperature of the low-temperature sewage secondary refrigerant is low, heat is absorbed to be high-temperature sewage secondary refrigerant (such as 30 ℃) while the secondary refrigerant outlet of the condenser 16 is connected with the inlet of the sewage heat exchanger 8 in the sewage cellar 4, the high-temperature sewage secondary refrigerant (such as 30 ℃) carries heat, and the sewage (such as 19 ℃) in the sewage cellar is heated (such as 23 ℃) by the sewage heat exchanger 5, namely, the sewage is discharged and is not utilized; meanwhile, the high-temperature sewage secondary refrigerant (such as 30 ℃) in the sewage cellar 4 is cooled to be reduced in temperature (such as 25 ℃) to be low-temperature sewage secondary refrigerant, the low-temperature sewage secondary refrigerant is used as a cold source again and returns to the condenser 4, the refrigerant in the condenser is cooled in the condenser 4 and is heated again to be high-temperature sewage secondary refrigerant, the process is repeated, and the circulation of a heat pump refrigerating system is ensured; the refrigerant outlet of the condenser 16 is connected to the liquid inlet of the liquid-gas separator 18, the high-temperature refrigerant liquid (e.g. 30 ℃) in the liquid-gas separator 18 continuously flows in, and simultaneously the low-temperature refrigerant gas (e.g. -1.0 ℃) introduced from the evaporator 19 also continuously flows in, and the high-temperature refrigerant liquid-the low-temperature refrigerant gas perform heat exchange in the liquid-gas separator 18 due to the large temperature difference: the temperature of the high-temperature refrigerant liquid is high, the temperature of the low-temperature refrigerant gas is reduced to be supercooled low-temperature refrigerant liquid (such as 15 ℃), the temperature of the low-temperature refrigerant liquid is low, the temperature of the low-temperature refrigerant gas is absorbed, the temperature of the low-temperature refrigerant gas is increased to be superheated refrigerant gas (such as 12 ℃), a gas outlet of the liquid storage gas-liquid separator 18 is connected with an inlet of the refrigeration compressor 17, and the superheated refrigerant gas enters the refrigeration compressor 17; the liquid outlet of the liquid storage gas-liquid separator 18 is connected with the inlet of a throttle valve 20, the outlet of the throttle valve 20 is connected with the refrigerant inlet of the evaporator 19, and the supercooled refrigerant liquid is decompressed to the evaporation pressure (such as 6.8 bar) through throttling and enters the evaporator 19; throttled low-temperature low-pressure refrigerant liquid (such as-1 ℃) and high-temperature seawater secondary refrigerant (such as 12 ℃) continuously flow into an evaporator 19 in two ways, heat exchange is carried out due to large temperature difference, the refrigerant liquid absorbs heat and evaporates into refrigerant gas due to low temperature, the high-temperature seawater secondary refrigerant releases heat due to high temperature and is cooled into the low-temperature seawater secondary refrigerant (such as 7 ℃), a secondary refrigerant outlet of the evaporator 19 is connected with an inlet of a seawater heat exchanger 5 in a constant-temperature sewage cellar 9, meanwhile, medium-temperature seawater (such as 19 ℃) in the constant-temperature seawater cellar 9 continuously flows through a preheating exchanger 15 to the constant-temperature seawater cellar and exchanges heat with the low-temperature seawater secondary refrigerant (such as 7 ℃) again due to temperature difference, heat is continuously supplemented to the low-temperature seawater secondary refrigerant through the seawater heat exchanger 5, and the high-temperature seawater secondary refrigerant (such as 7 ℃) carries energy to be used as a heat source of a heat energy unit 1, and the seawater enters the evaporator 19 again, the refrigerant outlet of the evaporator 19 is connected with the gas inlet of the liquid storage gas-liquid exchanger 18, the refrigeration cycle process is repeatedly completed, and the system is further ensured to prepare constant-temperature cold seawater (such as 14.5) from the normal-temperature fresh seawater (such as 22.5 ℃) in summer.

The utility model discloses produce the new sea well water of normal atmospheric temperature to constant temperature, carry the workshop of breeding, supply mariculture living beings to survive, grow and use, fall through the emission that will have the same constant temperature and breed the whole collections of sewage, as usable sewage energy, together with the compensation the utility model discloses the electric energy that heat pump and unit operation consumed converts the energy that production constant temperature sea well water required together. The system recovers the waste heat of the sewage discharged by mariculture, and comprises two steps, wherein the sewage is subjected to primary heat exchange: preheating or precooling new sea well water, extracting the rest heat of the sewage by a secondary refrigerant system through a special non-metal heat exchanger, and simultaneously converting energy into a heat source or a cold source of a heat pump unit; the seawater culture sewage source heat pump secondary refrigerant unit cools the seawater secondary refrigerant in summer and heats the seawater secondary refrigerant in winter, so that the normal-temperature seawater well water is cooled by the seawater secondary refrigerant in summer and is heated by the seawater secondary refrigerant in winter.

The utility model discloses a mariculture sewage source heat pump secondary refrigerant unit, secondary refrigerant system, sewage system and confession seawater system utilize energy-conserving means, realized completely with the control of cold and hot water temperature to mariculture.

Claims (7)

1. A mariculture sewage source heat pump secondary refrigerant constant-temperature cold-hot seawater system is characterized in that: the marine aquaculture sewage source heat pump secondary refrigerant unit comprises a marine aquaculture sewage source heat pump secondary refrigerant unit (1), a sewage cellar (4), a sewage heat exchanger (5), a seawater heat exchanger (8), a constant-temperature seawater cellar (9) and a aquaculture workshop discharge sewage system (14), wherein the marine aquaculture sewage source heat pump secondary refrigerant unit (1) comprises a unit sewage outlet (23), a unit cold side secondary refrigerant outlet (24), a unit cold side secondary refrigerant inlet (25), a unit hot side secondary refrigerant outlet (26), a unit secondary refrigerant inlet (27), a unit seawater inlet (28) and a unit seawater outlet (29), the aquaculture workshop discharge sewage system (14) is connected with the unit sewage inlet (22), the sewage outlet (23) is connected with the sewage cellar (4), the unit cold side secondary refrigerant outlet (24) is connected with an inlet of the sewage heat exchanger (5), an outlet of the sewage heat exchanger (5) is connected with the unit cold side secondary refrigerant inlet (25), the unit hot side secondary refrigerant outlet (26) is connected with a seawater heat exchanger (8), the outlet of the seawater heat exchanger (8) is connected with a unit hot side secondary refrigerant inlet (27), the unit seawater inlet (28) is connected with new seawater, and the unit seawater outlet (29) is connected with a constant temperature seawater cellar (9).

2. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 1, characterized in that: the mariculture sewage source heat pump secondary refrigerant unit (1) comprises a preheating exchanger (15), a condenser (16), a refrigeration compressor (17), a liquid storage gas-liquid separator (18), an evaporator (19) and a throttle valve (20) inside, wherein an outlet of the refrigeration compressor (17) is connected with a refrigerant inlet of the condenser (16), a refrigerant outlet of the condenser (16) is connected with a liquid inlet of the liquid storage gas-liquid separator (18), a liquid outlet of the liquid storage gas-liquid separator (18) is connected with the throttle valve (20), an outlet of the throttle valve (20) is connected with a refrigerant inlet of the evaporator (19), a refrigerant outlet of the evaporator (19) is connected with a gas inlet of the liquid storage gas-liquid separator (18), and a gas outlet of the liquid storage gas-liquid separator (18) is connected with an inlet of the refrigeration compressor (17).

3. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 1, characterized in that: a sewage stirrer (6) is arranged in the sewage cellar (4), and a seawater stirrer (7) is arranged in the constant-temperature seawater cellar (9).

4. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 1, characterized in that: a sewage pump (3) is arranged between the sewage inlet (22) of the unit and a sewage discharge system (14) of the aquaculture workshop, a sewage coolant pump (2) is arranged between the outlet of the sewage heat exchanger (5) and the cold-side coolant inlet (25) of the unit, the seawater inlet (28) of the unit is connected with new seawater through a seawater pump (10), and a seawater coolant pump (11) is arranged between the outlet of the seawater heat exchanger (8) and the hot-side coolant inlet (27) of the unit.

5. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 1, characterized in that: the sewage heat exchanger (5) is arranged in the sewage cellar (4), the seawater heat exchanger (8) is arranged in the constant-temperature seawater cellar (9), the sewage heat exchanger (5) and the seawater heat exchanger (8) are both immersion type non-metal heat exchangers, and a secondary refrigerant flow channel of the immersion type non-metal heat exchangers is circular.

6. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 2, characterized in that: the condenser (16) and the evaporator (19) are plate heat exchangers.

7. The mariculture sewage source heat pump coolant constant-temperature cold-hot seawater system according to claim 4, characterized in that: the outlet of the sewage coolant pump (2) is connected in parallel through a valve S5 and a valve S6 and then is respectively connected with a unit cold side coolant inlet (25) and a unit hot side coolant inlet (27) of the mariculture sewage source heat pump coolant unit (1) in two ways, the unit cold-side secondary refrigerant outlet (24) of the mariculture sewage source heat pump secondary refrigerant unit (1) is connected with the inlet of the sewage heat exchanger (5) through two parallel-connected valves S2 and S3, the outlet of the seawater coolant pump (11) is connected in parallel with a unit hot side coolant inlet (27) and a unit cold side coolant inlet (25) of the mariculture sewage source heat pump coolant unit (1) through a valve S7 and a valve S8 and then is divided into two paths to be connected with the unit hot side coolant inlet (27) and the unit cold side coolant inlet (25), and the cold-side refrigerating medium outlet (24) and the hot-side refrigerating medium outlet (26) of the unit are connected with the inlet of the seawater heat exchanger (8) through two parallel valves S1 and S4.

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