CN203848526U - Novel solar drying system - Google Patents

Abstract

The utility model discloses a novel solar drying system. The utility model includes a solar heat collector, the solar heat collector and the heat exchanger installed in the hot water storage tank are connected through pipelines to form a water heat circulation system, and an exhaust valve and a circulating water pump are installed on the connecting pipeline; The tank and the floor heating equipment installed under the floor of the drying room are connected through pipes to form a water-heat circulation system, and a circulating water pump and an electric tee are installed on the connecting pipes; the drying room is connected with the water-cooled evaporator and the water-cooled condenser in turn through the air pipe An air-heat circulation system is formed, and a hot air circulation fan is installed on the air outlet of the air pipe; a compressor, a four-way reversing valve, a throttle valve and an electric three-way are connected between the water-cooled evaporator and the water-cooled condenser. The utility model solves the problems of large energy consumption, waste of resources, long drying time of heat pump dryers, large investment in equipment, leakage of dust and waste gas in existing dryers, and can achieve both energy saving and environmental protection.

Description

A New Solar Drying System

technical field

The utility model belongs to the drying technical field, in particular to a novel solar drying system.

Background technique

With the development of society, modern industry has higher and higher requirements for production efficiency and product quality. The efficiency and effect of using natural wind to dry materials can no longer meet the requirements of modern people's life and modern industrial production. Under this demand, drying equipment is widely used, mainly used in fields such as wood, food, tobacco, medicine, papermaking, textile, chemical industry and cultural relics protection.

With the rapid development of production technology in various industries in our country, domestic drying technology and equipment have also developed rapidly. In terms of drying of granular materials, fluidization technology has been widely used and developed in recent years. Fluidized drying fully improves the gas-solid phase contact conditions (increases the evaporation surface area), and the violent agitation of the material greatly reduces the air film resistance, creating extremely favorable conditions for the heat transfer medium. In addition to the rapid development of the earlier airflow drying in domestic drying technology, fluidized drying equipment has developed the fastest in recent years, mainly manifested in the use of fluidized technology combined with the characteristics and requirements of various materials to be dried to create many new types of drying equipment. Efficient fluidized dryer. Straight tube airflow dryer is an earlier fluidized drying equipment used in China. After several years of production practice, it is considered that airflow drying is an ideal drying equipment for drying bulk materials, especially heat-sensitive materials. It is superior to oven drying in terms of production capacity and floor area, so it is more widely used in pharmaceutical, plastic, food, chemical fertilizer and other industries.

Currently commonly used dryers include electric heating dryers, coal-fired dryers, fuel oil dryers and heat pump dryers. Among them, the heat pump dryer has attracted much attention due to its advantages of high efficiency and energy saving, safety and environmental protection, effective control of temperature and humidity, and better maintenance of material quality, and has been more and more widely used in recent years. But the current heat pump dryer also has some problems, the most prominent of which are long drying time, large investment in equipment, leakage of dust and exhaust gas, etc. In order to increase the shipment volume of the drying system and meet the requirements of environmental protection, the heat pump drying system used is often more complicated and the system is larger, resulting in a substantial increase in equipment investment, which seriously restricts the popularization and use of heat pump dryers.

Through literature research, the current research on heat pump dryers at home and abroad mainly focuses on the following aspects: Experimental research on the optimal operating conditions for different materials; improvement of the heat pump part to increase the drying temperature; use of renewable energy in heat pump dryers And new energy such as solar energy etc., but these all fail to fundamentally solve the above-mentioned problem.

Contents of the invention

The purpose of this utility model is to provide a new type of solar drying system with solar energy as the main heat source in view of the above-mentioned defects in the prior art, which solves the problems of large energy consumption, waste of resources, and the existence of heat pump dryers in existing dryers. Long drying time, large equipment investment, dust and waste gas leakage, etc., can achieve both energy saving and environmental protection.

The purpose of this utility model is achieved through the following technical solutions: the new solar drying system, which includes a solar heat collector installed outdoors, the solar heat collector and the heat exchanger installed in the heat storage tank through the pipeline It is connected to form a water-heat circulation system. An exhaust valve and a circulating water pump are installed on the connecting pipe, and ball valves are respectively installed on the water inlet pipe and the drain pipe of the heat storage tank; the heat storage tank and the floor heating equipment installed under the floor of the drying room A water-heat circulation system is formed through pipeline connection, and a circulating water pump and an electric tee are installed on the connecting pipeline; the drying room is connected with a water-cooled evaporator and a water-cooled condenser in turn through an air pipe to form an air-heat circulation system, and the outlet of the air pipe A hot air circulation fan is installed on the tuyere; a compressor, a four-way reversing valve, a throttle valve and an electric three-way are connected between the water-cooled evaporator and the water-cooled condenser.

Specifically, the solar heat collector and the heat storage tank are installed on the roof of the drying room. The floor heating equipment mainly includes water pipes laid under the floor of the drying room.

The utility model utilizes the light-to-heat conversion principle of solar energy, relies on solar heat collectors to collect solar energy, uses the collected heat energy as a heat source to heat the water in the hot water storage tank and stores it, and sends the high-temperature water through the heat preservation water delivery pipeline To the pipeline laid in the floor of the drying room, the indoor air temperature is raised through floor radiation heat dissipation. First, the high-temperature and low-humidity dry gas is released from the water-cooled condenser, and works together with the solar heat source to heat and dry the materials in the drying chamber. The material can be dried quickly in the high-temperature and low-humidity gas. The sub-high-temperature and high-humidity gas is discharged from the drying chamber through the air duct and enters the water-cooled evaporator, and the water is cooled and precipitated to form a low-temperature and low-humidity gas. After being processed by the water-cooled condenser, the high temperature is obtained again. Low-humidity gas, this high-temperature and low-humidity gas re-enters the drying chamber for further drying, forming a complete drying cycle.

The solar heat collector used in the utility model and the floor heating equipment for fully utilizing the collected solar energy are all settings for enhancing the utilization rate of solar energy. The solar collector can flexibly adjust the orientation and inclination to improve the utilization rate of solar energy, while the floor heating equipment converts excess solar energy into thermal energy, and the hot water stored in the heat flows through the pipes laid under the floor of the drying room to achieve the flow in the drying room. The effect of gas heating. The utility model provides a continuous and high-quality heat source for drying by using the method of double heating and drying the indoor gas, enhances the drying efficiency, speeds up the drying time, and reduces energy input. In addition, in terms of environmental protection, the gas is recycled, so that the leakage of dust and waste gas can be shielded, and the dust and waste gas can be effectively controlled to prevent them from polluting the environment.

Description of drawings

Fig. 1 is a schematic diagram of the principle structure of an embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Referring to Fig. 1, the present embodiment includes a solar heat collector 1 installed outdoors, the solar heat collector 1 and the heat exchanger 4 installed in the heat storage tank 5 are connected by pipelines to form a hydrothermal circulation system, and the connection pipelines An exhaust valve 2 and a circulating water pump 3 are installed, and ball valves 6 are respectively installed on the water inlet pipe and the drain pipe of the heat storage tank 5; In the hydrothermal circulation system, the circulating water pump 15, the electric tee 701 and the electric tee 702 are installed on the connecting pipes; it can be seen from the figure that the floor heating equipment mainly includes the water pipe 16 laid under the floor of the drying room 14 . The drying chamber 14 is connected with the water-cooled evaporator 8 and the water-cooled condenser 10 successively through the air duct to form an air-heat circulation system, and a hot air circulation fan 13 is installed on the air outlet of the air duct; the water-cooled evaporator 8 and the water-cooled condenser 10 are connected with compressor 11, four-way reversing valve 12, throttle valve 9, electric three-way 703, electric three-way 704.

The utility model is transformed by combining the principle of air-conditioning cooling and dehumidification. Firstly, the dry gas with high temperature and low humidity is released from the condenser, and the water heated by solar energy is used as floor heating to heat the air in the drying room. The material can be dried quickly in the high-temperature and low-humidity gas, and then the sub-high-temperature and high-humidity gas discharged from the drying chamber enters the evaporator through the pipeline, and cools and precipitates moisture to achieve the dehumidification effect. The sub-high-temperature and high-humidity gas that precipitates moisture is transformed into a low-temperature and low-humidity gas, and after being processed by a compressor and a condenser, a high-temperature and low-humidity gas is obtained again. At this time, the high-temperature and low-humidity gas re-enters the drying chamber for further drying, thus forming a complete drying cycle.

The dehumidification part of the utility model uses a small amount of high-grade electric energy as the driving energy, efficiently absorbs low-grade heat energy from the low-temperature heat source, and transmits it to the high-temperature heat source to achieve the purpose of the drying system, thereby converting the energy with low energy quality coefficient into Energy with high energy quality coefficient (saving high-grade energy), that is, improving energy grade. Although the drying system consumes a certain amount of high-grade energy, the heat it supplies is the sum of the consumed high-grade energy and the absorbed low-grade energy. Therefore, the use of solar drying system can save high-grade energy, especially for the drying of materials in the warehouse in winter.

The utility model uses solar energy as the main energy source and improves the dehumidification principle of the air conditioner, which can improve the drying efficiency of the dryer and achieve the purposes of reducing energy consumption and emission. In addition, in terms of environmental protection of the drying system, the gas is recycled, so that the leakage of dust and waste gas can be shielded, and the dust and waste gas can be effectively controlled to avoid environmental pollution.

Claims (3)

1. a new type solar energy drying system, it is characterized in that: it comprises and is installed on outdoor solar thermal collector, solar thermal collector is connected to form a hydrothermal circulation system with the heat exchanger being installed in hot water storage tank by pipeline, air bleeding valve and water circulating pump are installed in connecting pipe, on the water inlet pipe of hot water storage tank and drainage pipeline, are separately installed with ball valve; Hot water storage tank be installed on the underfloor ground warm device of hothouse and be connected to form a hydrothermal circulation system by pipeline, water circulating pump and electric three passes are installed in connecting pipe; Hothouse is connected to form a wind-heat circulatory system with water-cooled evaporimeter and water cooled condenser successively by airduct, on the air outlet of airduct, hot air circulation blower is installed; Between water-cooled evaporimeter and water cooled condenser, be connected with compressor, four-way change-over valve, choke valve and electric three passes.

2. new type solar energy drying system according to claim 1, is characterized in that: described solar thermal collector and hot water storage tank are installed on the roof of hothouse.

3. new type solar energy drying system according to claim 1, is characterized in that: described ground warm device mainly comprises and is layed in the underfloor water pipe of hothouse.