CN112703933A - Thermal power plant coupled low-temperature heat supply agricultural greenhouse system and control method - Google Patents
Thermal power plant coupled low-temperature heat supply agricultural greenhouse system and control method Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 150
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 75
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 75
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- 239000003546 flue gas Substances 0.000 claims abstract description 58
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- 239000003337 fertilizer Substances 0.000 claims abstract description 25
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
- A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/18—Greenhouses for treating plants with carbon dioxide or the like
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/20—Forcing-frames; Lights, i.e. glass panels covering the forcing-frames
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
Abstract
The invention discloses a thermal power plant coupling low-temperature heat supply agricultural greenhouse system and a control method, wherein the system comprises a low-temperature heat supply network heat exchanger, a smoke purification conveying pipeline and an air fertilizer pipe which are arranged in a thermal power plant, the heat of the low-temperature heat supply network heat exchanger is supplied by the thermal power plant, the output end of the low-temperature heat supply network heat exchanger is connected with the input end of a radiator through a low-temperature heat supply network, the input end of the smoke purification conveying pipeline is connected with a smoke connecting pipeline behind a smoke dust remover of a boiler of the thermal power plant and before a chimney is discharged, the output end of the smoke fertilizer pipe is connected with the air fertilizer pipe, a plurality of air fertilizer air outlets are formed in the air fertilizer pipe, and the radiator and. The waste heat of the thermal power plant is utilized to realize low-temperature heat supply of the greenhouse system, the heating quantity of fuel is reduced, and the heat supply cost of the greenhouse is reduced. And partial clean flue gas discharged by the thermal power plant is utilized to realize the supply of carbon dioxide gas fertilizer for the greenhouse, and the carbon capture of the thermal power plant is realized through phase change.
Description
Technical Field
The invention belongs to the technical field of greenhouses, and particularly relates to a thermal power plant coupling low-temperature heat supply agricultural greenhouse system and a control method.
Background
Agricultural production seeks to achieve maximum yield over a limited land area, and crop yield is affected by environmental factors in addition to genetic involvement with the variety itself. Among them, temperature is one of the most important environmental parameters for crop growth and development, and the environmental temperatures required by different crops at different growth stages are different. For the greenhouse in the northern cold area of China, the complex environment inside and outside the greenhouse makes the control of the crop growth environment extremely difficult. The traditional greenhouse is mostly used for maintaining the temperature in the greenhouse by collecting heat from sunlight, but if extremely cold weather is met, the damage to crops is likely to be caused, the yield is reduced, and even the crops die. Therefore, the efficient and economical heat supply mode of the current greenhouse system becomes the key for the successful operation of the greenhouse.
In addition, the plant grows in the process that the leaves absorb carbon dioxide under the irradiation of sunlight, the root system absorbs mineral substances and water and transmits the mineral substances and the water to the leaves, and chloroplasts in the leaves perform photosynthesis under proper temperature conditions to produce carbohydrates and release energy and oxygen. Generally, the produced organic substances need to consume and absorb carbon dioxide, so the carbon dioxide is an important raw material for photosynthesis of plants and plays an important role in normal growth of the plants as much as water and minerals.
However, plants cultivated in a greenhouse are grown under specific environmental conditions, and in order to maintain indoor temperature, natural ventilation is performed for a short time every day except at noon and at a high temperature, and the greenhouse is closed for most of the time, so that carbon dioxide required for the growth of the plants in the greenhouse can only come from the respiration of air, plants and microorganisms in soil and the decomposition of the microorganisms in the soil, and the respiration and the decomposition of the plants and the microorganisms release a small amount of carbon dioxide into the space at a relatively slow speed. In general, the carbon dioxide concentration in the greenhouse reaches a maximum value before the greenhouse is not irradiated by sunlight in the morning, and then gradually decreases with the progress of photosynthesis until the carbon dioxide concentration in the greenhouse reaches a minimum value before ventilation. The reduction of the concentration of the carbon dioxide slows down the photosynthesis speed of the plants in the greenhouse, influences the normal growth and development of the plants and causes the yield reduction of the crops.
Therefore, how to supply the gas fertilizer to the greenhouse under the premise of meeting the requirement of heat supply of the greenhouse becomes an important direction for many researchers and agricultural scientific research.
Disclosure of Invention
The invention provides a thermal power plant coupled low-temperature heat supply agricultural greenhouse system and a control method, which can simultaneously realize heat supply and carbon dioxide supply to a greenhouse and improve the yield of greenhouse crops.
In order to achieve the purpose, the agricultural greenhouse system with coupled low-temperature heat supply of the thermal power plant comprises a clean flue gas conveying pipeline, a gas fertilizer pipe and a low-temperature heat supply network heat exchanger arranged in the thermal power plant, wherein heat of the low-temperature heat supply network heat exchanger is supplied by the thermal power plant, the output end of the low-temperature heat supply network heat exchanger is connected with the input end of a radiator through a low-temperature heat supply network, the input end of the clean flue gas conveying pipeline is connected with a flue gas connecting pipeline behind a flue gas dust remover of a boiler of the thermal power plant and in front of a discharge chimney, the output end of the clean flue gas conveying pipeline is connected with the gas fertilizer pipe, the gas fertilizer pipe is provided with a plurality of gas fertilizer gas outlets.
Further, the heating heat source of the low-temperature heat supply network heat exchanger is any one or combination of heat sources of steam turbine heat supply steam extraction, heat-engine plant boiler flue gas waste heat, circulating water waste heat pump heat supply and the like.
Furthermore, the steam turbine for heat supply and steam extraction is any one or combination of high-pressure cylinder steam extraction, reheating hot section steam extraction, intermediate pressure cylinder steam extraction and low-pressure cylinder steam extraction.
Further, the flue gas of the boiler flue gas waste heat comes from the front of the economizer, the front of the desulfurization device and/or the front of the denitration device.
Furthermore, a temperature monitoring control unit, a humidity monitoring control unit, a carbon dioxide concentration monitoring control unit, an oxygen concentration monitoring control unit, a nitrogen concentration monitoring control unit and an air pressure monitoring control unit are arranged in the agricultural greenhouse and used for monitoring and controlling the temperature, the humidity, the carbon dioxide concentration, the oxygen concentration, the nitrogen concentration and the air pressure in the agricultural greenhouse in real time.
Further, the carbon dioxide concentration monitoring control unit comprises a carbon dioxide concentration sensor and a control valve arranged on the clean flue gas conveying pipeline.
Furthermore, the temperature parameter monitoring and controlling unit comprises a plurality of temperature sensors arranged in the agricultural greenhouse, a hot water flow regulating valve arranged on the low-temperature heat supply pipeline and an outdoor meteorological temperature information unit; the outdoor meteorological temperature information unit is used for measuring the temperature outside the agricultural greenhouse.
Furthermore, a carbon dioxide concentration alarm unit is arranged in the agricultural greenhouse and is associated with an access control system of the agricultural greenhouse, when the carbon dioxide concentration is higher than the human body dangerous concentration, an alarm warning lamp is arranged to be turned on, and when the carbon dioxide concentration is higher than the human body dangerous concentration, the access control system prohibits persons who do not carry the self-breathing gas from entering the agricultural greenhouse.
Furthermore, the greenhouse system is provided with an electric power light supplementing and illuminating unit, and the electric power light supplementing and illuminating unit is powered by a thermal power plant.
A control method for a thermal power plant coupled low-temperature heat supply agricultural greenhouse comprises the following steps:
s1: planning and designing the scale and the area of the greenhouse according to the situation of the agricultural land around the thermal power plant;
s2: designing a greenhouse heat supply technical scheme and a heat source according to the capacity of a thermal power plant unit;
s3: designing a clean flue gas connecting pipeline to be connected to the agricultural greenhouse by a route according to the smoke discharge amount of a chimney of a thermal power plant;
s4: customizing an indoor air fertilizer pipe and radiating pipe pipeline arrangement scheme and a climate environment control strategy of the greenhouse according to the types of crops in the agricultural greenhouse in combination with outdoor temperature;
s5: designing control schemes of environmental parameters such as temperature, humidity, carbon dioxide and the like at different time intervals in the agricultural greenhouse; and controlling the temperature, the humidity and the carbon dioxide concentration in the agricultural greenhouse according to the control scheme, the real-time monitored greenhouse indoor temperature, humidity and carbon dioxide concentration, the crop type and meteorological data.
Compared with the prior art, the invention has at least the following beneficial technical effects:
1) the invention utilizes the waste heat of the thermal power plant to realize the low-temperature heat supply of the greenhouse system, thereby further utilizing the waste heat of the flue gas, reducing the heating amount of the fuel and reducing the heat supply cost of the greenhouse. Meanwhile, partial clean flue gas discharged by the thermal power plant is utilized to realize the supply of carbon dioxide and fertilizer for the greenhouse, and the carbon capture of the thermal power plant is realized in a phase-change manner. The green plants absorb carbon dioxide in the environment through light and release oxygen, and the emission of greenhouse gases is reduced.
2) The heat pump for the waste heat of the circulating water is used for capturing the heat dissipated by the circulating water and providing heat for the greenhouse, so that the waste heat of the circulating water of the thermal power plant can be utilized, the thermal power unit is reduced, and the comprehensive energy efficiency of the thermal power unit is improved.
3) The waste heat of the flue gas of the thermal power plant is utilized, and the temperature influence of the flue gas of the thermal power plant on the surrounding environment is reduced.
Furthermore, the electricity generation of thermal power plant is direct to the power supply of agricultural greenhouse, and usable thermal power plant's low-priced electric power carries out the light filling according to the crops condition in overcast and rainy weather or night, realizes greenhouse's all-weather light filling, realizes artifical sunshine in other words, increases crops output.
Furthermore, the environment information in the greenhouse is monitored in real time through the environment parameter monitoring and controlling unit, and the temperature, the humidity, the carbon dioxide concentration, the oxygen concentration, the nitrogen concentration and the air pressure in the greenhouse are adjusted according to the real-time environment parameter data and the set environment parameters, so that accurate control is realized.
According to the agricultural greenhouse system and the control method provided by the invention, the thermal power plant and the agricultural greenhouse are coupled, waste heat generated in the power generation process of the thermal power plant is used for supplying heat to the greenhouse, and clean flue gas generated by the thermal power plant is used for supplying carbon dioxide to the greenhouse, so that the energy consumption is effectively reduced.
Drawings
FIG. 1 is a schematic flow diagram of heat and carbon dioxide gas in accordance with the present invention;
FIG. 2 is a schematic view of example 2 of the present invention;
in the drawings: 1. the system comprises a low-temperature heat supply network pipe, 2, a clean flue gas conveying pipeline, 3, an underground radiating pipe, 4, a forced convection high-efficiency steel-aluminum radiator, 5, an air fertilizer outlet, 6, a sensor, 7, a light supplement lighting unit, 8, an air fertilizer pipe, 100, a thermal power plant, 200 and an agricultural greenhouse.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The waste heat of the flue gas after acting is used for driving an absorption unit or passes through heat exchange equipment such as a boiler and a heat exchanger to supply cold or heat for a user, and finally the discharged low-temperature flue gas is injected into the plant greenhouse, wherein the flue gas contains a large amount of waste heat, carbon dioxide, oxynitride and water vapor, so that the heat preservation of the plant greenhouse and the absorption and utilization of plants can be realized, the complete utilization of energy and resources is finally realized, and the zero emission of all pollutants is realized. The operation, adjustment and maintenance of the whole system can be completely and automatically controlled by a computer, and the system is stable in operation, safe and reliable.
The normal growth of the plants needs a large amount of water and various nutrients, and the green plants absorb carbon dioxide, release oxygen, purify air and synthesize the nutrients needed by the growth of the green plants under the illumination condition through light and action. The natural gas flue gas contains a large amount of water vapor, carbon dioxide and nitrogen which are necessary for plant growth and can be completely absorbed and utilized by plants.
The absorption and utilization of the smoke by the plants mainly focus on the following aspects:
absorbing and utilizing the water vapor. The temperature of the plant greenhouse is usually below 40 ℃ and lower than the condensation temperature of water vapor, the water vapor is condensed into liquid water after the flue gas enters the plant greenhouse, and plants are absorbed and utilized through root systems and leaves.
Further recycling the waste heat of the flue gas. In non-cooling seasons, a lithium bromide absorption type unit in a power plant operates in a heat pump mode, the temperature of smoke discharged by an absorption type heat pump is about 40 ℃, the temperature of the smoke is still higher than the ambient temperature and the temperature of the smoke is also higher than that of a plant greenhouse, and partial heat can be recycled. After entering the plant greenhouse, the flue gas is mixed with air in the greenhouse for heat exchange, so that the temperature in the plant greenhouse is raised, the waste heat of the flue gas is further utilized, the heating quantity of fuel is reduced, the consumption of the fuel is reduced, the energy is saved, and the emission of pollutants is reduced.
Absorbing and utilizing carbon dioxide. The green plants absorb carbon dioxide in the environment through light and release oxygen, and the emission of greenhouse gases is reduced.
The effect of carbon dioxide concentration on plant growth is shown in Table 1
TABLE 1 Effect of increased carbon dioxide on vegetable yield
When the carbon dioxide gas fertilizer is applied additionally, the supplement concentration of the carbon dioxide should not exceed the saturation point generally, preferably, the supplement concentration of the carbon dioxide should not exceed the saturation point, and production practices show that the optimal time for supplementing the carbon dioxide gas fertilizer is from ten am to ten fourths afternoon every day, the illumination intensity is strongest at the moment, the light and action of plants are strongest, the absorbed carbon dioxide is the most, the supplement at the proper time in winter and spring is the most critical generally, and the optimal growth concentration of vegetables is one time. If the concentration of the greenhouse reapplication is targeted as: deducting the content of carbon dioxide originally in the atmosphere, it is equivalent to about the need of carbon dioxide supplement in each cubic meter of space volume.
At present, the content of carbon dioxide in the atmosphere is about 0.03%, and thus the concentration of carbon dioxide in the atmosphere is 300. mu.L/L. The plant shows obvious effects of increasing both production and income under the condition of high-concentration carbon dioxide, the concentration of the carbon dioxide in the plant growing environment can be completely increased to 1000-1500 mu L/L, the quantity of the carbon dioxide which needs to be supplemented in each space is 700-1200 mu L/L, if the quantity is converted into mass, the density of the carbon dioxide is 1.96g/L, and the quantity of the carbon dioxide which needs to be supplemented in each cubic meter of space is 1.372-2.352 g.
Example 1
Referring to fig. 1, a method for controlling indoor climate environment of a low-temperature heat supply agricultural greenhouse comprises the following steps:
s1: planning and designing the scale and the area of the greenhouse according to the situation of the agricultural land around the thermal power plant;
s2: designing a greenhouse heat supply technical scheme and a heat source according to the condition of a thermal power plant unit, wherein the greenhouse heat supply technical scheme comprises a heat supply mode adopted for heat supply;
s3: designing a clean flue gas connecting pipeline to be connected to the greenhouse by a route according to the smoke exhaust condition of a chimney of a thermal power plant;
s4: customizing an indoor pipeline arrangement scheme and a climate environment control strategy of the greenhouse according to the crop types of the greenhouse and combining outdoor temperature meteorological data; the environment control strategy comprises reasonable values of all environment parameters in the greenhouse at different time periods, wherein the environment parameters comprise temperature, humidity, carbon dioxide concentration, oxygen concentration, nitrogen concentration and air pressure.
S5: designing control programs of environmental parameters such as temperature, humidity and carbon dioxide in the greenhouse in the morning, at noon and evening of a day; the control program of the parameters makes a reasonable control strategy according to the real-time monitored environmental parameter data of the greenhouse indoor temperature, humidity, carbon dioxide and the like and according to the types of crops and meteorological data, so that the optimal influence of the parameters on the crops is realized.
Example 2
The equipment in the thermal power plant mainly comprises a boiler of the thermal power unit, a steam turbine, a generator and accessory equipment thereof.
Referring to fig. 2, the thermal power plant coupling low-temperature heat supply agricultural greenhouse system comprises a low-temperature heat supply network heat exchanger, a low-temperature heat supply network 1, an agricultural greenhouse 200, a radiator, a clean flue gas conveying pipeline 2, a gas fertilizer pipe 8 and a control valve in the thermal power plant, and boiler flue gas is supplied according to the demand of carbon dioxide in different periods of time in the greenhouse.
Wherein, the heat that low temperature heat supply network heat exchanger utilized the electricity generation in-process to produce in the thermal power plant adds the medium, and the hot water export of low temperature heat supply network heat exchanger in the thermal power plant passes through low temperature heat supply network 1 and sets up the radiator intercommunication in agricultural greenhouse 200, provides the heat through the radiator to greenhouse, and the radiator is the high-efficient radiator of low temperature heat supply, and the radiator is the high-efficient steel aluminium radiator of forced convection 4 and buries the combination of cooling tube 3 in agricultural greenhouse 200.
The clean flue gas conveying pipeline 2 is used for conveying clean flue gas to a gas fertilizer pipe 8 arranged in the greenhouse 200, a plurality of gas fertilizer outlets 5 are uniformly formed in the gas fertilizer pipe 8, and carbon dioxide and water vapor are output through the gas fertilizer outlets 5. After the flue gas enters the plant greenhouse, the water vapor is condensed into liquid water, and the plants are absorbed and utilized through root systems and leaves.
The clean flue gas in the clean flue gas conveying pipeline 2 comes from a flue gas connecting pipeline behind a boiler flue gas dust remover of a thermal power plant and before a chimney, the clean flue gas is used for meeting carbon dioxide requirements of the greenhouse, and meanwhile, waste heat in the clean flue gas is utilized in the greenhouse.
The greenhouse 200 is internally provided with a sensor 6, which comprises a temperature sensor, a humidity sensor, a carbon dioxide concentration sensor, an oxygen concentration sensor, a nitrogen concentration sensor, an air pressure sensor and the like, and is used for monitoring environmental parameters such as temperature, humidity, carbon dioxide concentration, oxygen concentration, nitrogen concentration, air pressure and the like in the greenhouse 200 in real time.
The greenhouse system is provided with a temperature monitoring control unit and a carbon dioxide concentration monitoring control unit, and real-time monitoring and accurate control of temperature and carbon dioxide concentration are realized according to monitored environmental parameters.
The temperature monitoring control unit comprises a plurality of temperature sensors, a heat supply hot water flow regulating valve and an outdoor meteorological temperature information unit which are arranged in the greenhouse 200. When the temperature in the greenhouse 200 is too high or too low, the heat quantity sent into the greenhouse 200 is adjusted by controlling the opening degree of the hot water flow adjusting valve of the underground radiating pipe with reference to the outdoor temperature, so as to achieve the purpose of adjustment.
The carbon dioxide concentration monitoring control unit comprises a carbon dioxide concentration sensor, a greenhouse air pressure monitoring facility and a purified flue gas connecting pipeline control valve. For example, when the concentration of carbon dioxide in the greenhouse 200 is too high or too low, the amount of carbon dioxide fed into the greenhouse 200 can be adjusted by controlling the opening degree of the valve through controlling the clean flue gas connection pipeline.
Preferably, the greenhouse system is provided with a carbon dioxide concentration alarm unit, the concentration alarm unit comprises an alarm indicator light, the concentration alarm unit is associated with the access control system, when the carbon dioxide concentration is higher than the human body dangerous concentration, the alarm indicator light is turned on, and under the condition that the carbon dioxide concentration is higher than the human body dangerous concentration, the access control system prohibits personnel who do not carry the self-breathing system (such as an oxygen cylinder) from entering the greenhouse.
Greenhouse system upper portion sets up electric power light filling lighting unit, and electric power light filling lighting unit 7 utilizes direct power drive light filling lighting unit that supplies of thermal power plant, at overcast and rainy weather or night, carries out the light filling according to the crops condition, and reinforcing crops photosynthesis time increases crops output.
Example 3
The present embodiment is different from embodiment 2 in that:
the heating heat source of the low-temperature heat supply network heat exchanger is the waste heat of the boiler flue gas of the thermal power plant, namely the waste heat of the boiler flue gas of the thermal power plant is utilized to heat the medium. The flue gas of the boiler flue gas waste heat comes from the front of the economizer, the front of the desulfurization device and the front of the denitration device, the low-temperature heat supply hot water is heated by the boiler flue gas waste heat exchanger, and then the hot water is conveyed to a low-temperature heat supply pipe network.
The greenhouse system is provided with a temperature, humidity, carbon dioxide concentration, oxygen concentration, nitrogen concentration, air pressure and other parameter monitoring and controlling unit for realizing real-time monitoring and accurate control of the environmental parameters. The low-temperature heat supply efficient radiator in the greenhouse is formed by combining or combining an efficient radiating coil pipe and an efficient radiating capillary pipe.
Example 4
The present embodiment is different from embodiment 2 in that:
the heating heat source of the low-temperature heat supply network heat exchanger is the waste heat of the boiler flue gas of the thermal power plant, namely the waste heat of the boiler flue gas of the thermal power plant is used for heating a medium, the flue gas of the waste heat of the boiler flue gas comes from the front of an economizer, the front of a desulfurization device and the front of a denitration device, the low-temperature heat supply hot water is heated by the waste heat exchanger of the boiler flue gas, and then the hot water is conveyed to the low-.
The low-temperature heat supply efficient radiator in the greenhouse is an efficient radiating coil pipe.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A thermal power plant coupling low-temperature heat supply agricultural greenhouse system is characterized by comprising a clean flue gas conveying pipeline (2), an air fertilizer pipe (8) and a low-temperature heat supply network heat exchanger arranged in the thermal power plant, wherein heat of the low-temperature heat supply network heat exchanger is supplied by the thermal power plant, and the output end of the low-temperature heat supply network heat exchanger is connected with the input end of a radiator through a low-temperature heat supply network (1); the input of clean flue gas pipeline (2) and thermal power plant's boiler flue gas dust remover back discharge the flue gas connecting line before the chimney connect, and output and fertile pipe (8) are connected, fertile pipe of gas (8) are last to have seted up a plurality of gas fertilizer gas outlets (5), radiator and fertile pipe of gas (8) equipartition are put in green house (200).
2. The agricultural greenhouse system with coupled low-temperature heat supply of the thermal power plant as claimed in claim 1, wherein the heating source of the low-temperature heat supply network heat exchanger is any one or combination of heat sources such as steam extraction by a steam turbine, waste heat of boiler flue gas of the thermal power plant, heat supply by a circulating water waste heat pump, and the like.
3. The coupled low-temperature heat supply agricultural greenhouse system of the thermal power plant as claimed in claim 2, wherein the steam turbine heat supply extraction is any one or a combination of high-pressure cylinder extraction, reheating hot section extraction, intermediate pressure cylinder extraction and low-pressure cylinder extraction.
4. The agricultural greenhouse system with coupled low-temperature heat supply of the thermal power plant as claimed in claim 1, wherein the flue gas of the boiler flue gas waste heat comes from the front of an economizer, the front of a desulfurization device and/or the front of a denitrification device.
5. The coupled low-temperature heat supply agricultural greenhouse system of the thermal power plant as claimed in claim 1, wherein the agricultural greenhouse (200) is provided therein with a temperature monitoring control unit, a humidity monitoring control unit, a carbon dioxide concentration monitoring control unit, an oxygen concentration monitoring control unit, a nitrogen concentration monitoring control unit and an air pressure monitoring control unit for monitoring and controlling temperature, humidity, carbon dioxide concentration, oxygen concentration, nitrogen concentration and air pressure in the agricultural greenhouse (200) in real time.
6. The thermal power plant coupled low-temperature heat supply agricultural greenhouse system as claimed in claim 5, wherein the carbon dioxide concentration monitoring and controlling unit comprises a carbon dioxide concentration sensor and a control valve arranged on the clean flue gas conveying pipeline (2).
7. The thermal power plant coupled low-temperature heat supply agricultural greenhouse system as claimed in claim 5, wherein the temperature parameter monitoring and controlling unit comprises a plurality of temperature sensors arranged in the agricultural greenhouse (200), a hot water flow regulating valve arranged on a low-temperature heat supply pipeline, and an outdoor meteorological temperature information unit; the outdoor meteorological temperature information unit is used for measuring the temperature outside the agricultural greenhouse (200).
8. The coupled low-temperature heat supply agricultural greenhouse system of the thermal power plant as claimed in claim 1, wherein a carbon dioxide concentration alarm unit is arranged in the agricultural greenhouse (200), the carbon dioxide concentration alarm unit is associated with an access control system of the agricultural greenhouse (200), when the carbon dioxide concentration is higher than the human body dangerous concentration, an alarm warning lamp is set to light up, and when the carbon dioxide concentration is higher than the human body dangerous concentration, the access control system prohibits persons who do not carry self-breathing from entering the agricultural greenhouse (200).
9. The thermal power plant coupled low-temperature heat supply agricultural greenhouse system as claimed in claim 1, wherein the greenhouse system is provided with an electric supplementary lighting unit (7), and the electric supplementary lighting unit (7) is powered by the thermal power plant.
10. A control method for a thermal power plant coupled low-temperature heat supply agricultural greenhouse is characterized by comprising the following steps:
s1: planning and designing the scale and the area of the greenhouse (200) according to the situation of the agricultural land around the thermal power plant;
s2: designing a greenhouse heat supply technical scheme and a heat source according to the capacity of a thermal power plant unit;
s3: designing a clean flue gas connecting pipeline to be connected to an agricultural greenhouse (200) through a route according to the smoke discharge amount of a chimney of a thermal power plant;
s4: customizing an indoor air fertilizer pipe (8) and radiating pipe pipeline arrangement scheme and a climate environment control strategy of the greenhouse according to the types of crops in the agricultural greenhouse (200) by combining the outdoor temperature;
s5: designing control schemes of environmental parameters such as temperature, humidity, carbon dioxide and the like at different time intervals in the agricultural greenhouse (200); and controlling the temperature, the humidity and the carbon dioxide concentration in the agricultural greenhouse (200) according to the control scheme, the real-time monitored greenhouse indoor temperature, humidity and carbon dioxide concentration, the crop type and meteorological data.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396752A (en) * | 2021-05-19 | 2021-09-17 | 华电电力科学研究院有限公司 | By using CO discharged from coal-fired unit2Method and system for providing air fertilizer for plant greenhouse |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102160505A (en) * | 2011-03-10 | 2011-08-24 | 武汉凯迪工程技术研究总院有限公司 | Method and system for providing carbon dioxide and heat for greenhouse |
| CN102318511A (en) * | 2011-07-19 | 2012-01-18 | 重庆理工大学 | Method for applying carbon dioxide and rising temperature in greenhouse |
| CN206821479U (en) * | 2017-05-31 | 2018-01-02 | 南京电力设备质量性能检验中心 | A kind of thermal power plant's energy and carbon dioxide based on plant factor utilize system |
| CN109258241A (en) * | 2018-08-22 | 2019-01-25 | 江苏大学 | A kind of greenhouse united heat and for carbon dioxide system |
| CN214282454U (en) * | 2020-12-24 | 2021-09-28 | 中国华能集团清洁能源技术研究院有限公司 | Utilize fertile green house big-arch shelter system of thermal power plant heat supply gas supply |
-
2020
- 2020-12-24 CN CN202011555951.7A patent/CN112703933A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102160505A (en) * | 2011-03-10 | 2011-08-24 | 武汉凯迪工程技术研究总院有限公司 | Method and system for providing carbon dioxide and heat for greenhouse |
| CN102318511A (en) * | 2011-07-19 | 2012-01-18 | 重庆理工大学 | Method for applying carbon dioxide and rising temperature in greenhouse |
| CN206821479U (en) * | 2017-05-31 | 2018-01-02 | 南京电力设备质量性能检验中心 | A kind of thermal power plant's energy and carbon dioxide based on plant factor utilize system |
| CN109258241A (en) * | 2018-08-22 | 2019-01-25 | 江苏大学 | A kind of greenhouse united heat and for carbon dioxide system |
| CN214282454U (en) * | 2020-12-24 | 2021-09-28 | 中国华能集团清洁能源技术研究院有限公司 | Utilize fertile green house big-arch shelter system of thermal power plant heat supply gas supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113396752A (en) * | 2021-05-19 | 2021-09-17 | 华电电力科学研究院有限公司 | By using CO discharged from coal-fired unit2Method and system for providing air fertilizer for plant greenhouse |
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