Small-sized biomass fuel paraffin heat storage greenhouse heating device with purification function

Abstract

This invention discloses a miniaturized biomass fuel paraffin thermal storage greenhouse heating device with purification function. The system includes: an inertial water bend, a decontamination valve, a flue gas purification water storage tank, a demister, a ribbed frustum heat exchanger, a paraffin thermal storage tank, and a variable cross-section heat exchange spiral tube. The inertial water bend is used for inertial dust removal and can prevent water backflow caused by flue gas pressure fluctuations; the decontamination valve can discharge dust accumulated in the bend and the flue gas purification water storage tank; the flue gas purification water storage tank is used to adsorb solid particles in the flue gas, while simultaneously allowing the flue gas to carry water vapor, achieving the effect of flue gas purification; the purified flue gas passes through the demister, causing most of the droplets to fall back into the storage tank; then, the flue gas carrying water vapor undergoes condensation and convection heat exchange with the ribbed frustum heat exchanger; the paraffin thermal storage tank stores the obtained heat through paraffin phase change, and finally, the heat is exchanged with water in the variable cross-section heat exchange spiral tube to obtain the required heating hot water. This invention is easy to clean and purifies flue gas while making full use of biomass thermal energy, thus protecting the environment and saving energy.

Description

Technical Field

[0001] This invention relates to a greenhouse heating device, specifically a miniaturized biomass fuel paraffin heat storage greenhouse heating device with purification function. Background Technology

[0002] Greenhouses are plant cultivation devices that require a continuous supply of heat for winter insulation. Most greenhouses in my country still use scattered coal burning for heating, which is inefficient and easily produces toxic gases such as carbon monoxide, negatively impacting farmers' safety and air quality. While common heating methods such as electric heating, air source heat pump heating, and solar heating are relatively safe, they still have drawbacks such as high installation and operating costs and susceptibility to ambient air pollution. Using biomass boilers can promote the recycling of crop straw within greenhouses, achieving self-production and self-sales of biomass resources and reducing operating costs. Furthermore, the gases emitted from boiler combustion are clean and pollution-free, and the carbon dioxide produced can promote crop growth, achieving a multi-purpose effect. Currently, large-scale biomass boiler heating systems exist, but their high cost makes them unsuitable for small greenhouses, lacking universality. In addition, the systems are large and complex, making cleaning difficult. Summary of the Invention

[0003] The purpose of this invention is to propose a miniaturized biomass fuel paraffin thermal storage greenhouse heating device with purification function. Considering the strong phase change heat storage capacity of paraffin and the high specific heat capacity and adsorption properties of water, this invention utilizes water adsorption to remove dust from flue gas, while simultaneously allowing the cleaned flue gas to carry water vapor. This water vapor phase change heat transfer is utilized, and paraffin phase change stores thermal energy, achieving biomass heat utilization and enabling rapid flue gas purification. This not only provides a heat source for the greenhouse but also protects the environment. Furthermore, the difference in inertia between dust and gas in the flue gas causes dust to settle at the bottom of the pipes, providing a cleaning effect. When clean water is introduced into the system, system cleaning and water replenishment can be achieved by adjusting the opening and closing of the decontamination valve. The entire system has a simple structure, directly treats the flue gas, and fully utilizes the heat in the flue gas.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A small-scale biomass fuel paraffin thermal storage greenhouse heating device with purification function is composed of an inertial water bend pipe (1), a decontamination valve (2), a flue gas purification storage tank (3), a demister (4), a ribbed frustum heat exchanger (5), a paraffin thermal storage tank (6), and a variable cross-section heat exchange spiral tube (7). Among them, the inertial water bend pipe (1) uses inertia to separate dust in the flue gas, which is deposited at the bottom of the inertial water bend pipe and then discharged through the decontamination valve (2).

[0006] Preferably, the system must prevent water in the flue gas purification water storage tank (3) from flowing back into the flue gas inlet. The flue gas inlet of the inertial water bend (1) is not lower than the water level in the flue gas purification water storage tank (3), so that when there is no flue gas input, the water in the flue gas purification water storage tank (3) cannot flow back into the flue gas inlet due to pressure fluctuations because of the two bends of the inertial water bend (1).

[0007] Preferably, the system needs to prevent a large loss of water in the flue gas purification water storage tank (3). The demister (4) can separate the large water droplets carried by the high-temperature gas after passing through the flue gas purification water storage tank (3), so that the large water droplets return to the flue gas purification water storage tank (3). After the water vapor in the high-temperature gas undergoes condensation heat exchange with the inclined surface of the ribbed frustum heat exchanger (5), the generated water droplets will return to the flue gas purification water storage tank under the action of gravity.

[0008] Preferably, the ribs on the outer surface of the ribbed frustum heat exchanger (5) gradually decrease in distance from top to bottom between two adjacent ribs.

[0009] Preferably, the inertial water bend (1) and the flue gas purification water storage tank (3) are connected. Water is introduced into the inertial water bend (1), and the decontamination valve (2) at the inertial water bend (1) is opened first to flush and clean the inertial water bend (1) with water. After completion, the decontamination valve (2) at the inertial water bend (1) is closed, and the decontamination valve (2) at the flue gas purification water storage tank (3) is opened to flush and clean the system with water. Then, the decontamination valve (2) at the flue gas purification water storage tank (3) is closed to complete the cleaning of the system. When the system needs to replenish water, all decontamination valves (2) are closed, and water is introduced into the inertial water bend (1) until the water supply in the flue gas purification water storage tank (3) is sufficient, thereby achieving rapid cleaning of the system and rapid replenishment of water.

[0010] Furthermore, the variable cross-section heat exchange spiral tube (7) is a spiral bend with equal transverse radius, but its diameter gradually decreases from top to bottom. Under the condition of constant flow rate, the fluid velocity in the tube gradually increases from top to bottom. Considering the paraffin content distribution in the paraffin heat storage tank (6) and the heat exchange through the ribbed frustum heat exchanger (5), rapid and efficient heat exchange can be achieved.

[0011] The gain effect of the present invention:

[0012] (1) This invention patent rapidly purifies the flue gas after biomass fuel combustion, and efficiently exchanges and stores heat. It can effectively utilize the heat energy of the flue gas after biomass fuel combustion, while purifying the final particulate matter of the smoke and protecting the environment.

[0013] (2) This invention patent uses paraffin phase change heat storage, which can collect and store a large amount of waste heat, realize the peak guarantee of energy supply and demand, and achieve the purpose of energy saving.

[0014] (3) The demister of this invention can separate the moisture carried by the high temperature gas, which is conducive to the full heat transfer of the high temperature gas, improves the heat transfer efficiency and saves water resources.

[0015] (4) The ribbed frustum heat exchanger of this invention has an outer annular ribs that gradually decrease in spacing between adjacent ribs from top to bottom. This not only increases the contact area between the fluid and the heat exchanger but also improves heat distribution and increases heat exchange efficiency. Furthermore, the inclined curved surface increases the heat exchange area while allowing the water after high-temperature water vapor condensation and heat exchange to flow back into the flue gas purification water storage tank, thus saving water resources.

[0016] (5) The variable cross-section heat exchange spiral tube inside the present invention fully considers the space and heat distribution within the device. The cross-sectional area of ​​the tube gradually decreases from top to bottom, and the flow velocity gradually increases while the flow rate remains constant. The variable cross-section heat exchange spiral tube takes into account the paraffin content distribution in the paraffin heat storage tank (6), and changes the cross-sectional area of ​​the location to change the fluid velocity, thereby effectively improving the heat transfer efficiency.

[0017] (6) The structural connection of this invention patent allows the system to be cleaned and the water supply replenished by adjusting the opening and closing of the decontamination valve. Attached Figure Description

[0018] Figure 1 This invention patent describes a miniaturized biomass fuel paraffin thermal storage greenhouse heating device with purification function.

[0019] Figure 2 This is a schematic diagram of a variable cross-section heat exchange spiral tube.

[0020] Figure 3 Schematic diagram of inertial water bend inertial dust removal

[0021] Figure 4 This is a schematic diagram of water vapor condensation heat exchange and reflux inside a ribbed frustum heat exchanger.

[0022] Figure 5 This is a schematic diagram of a ribbed frustum heat exchanger.

[0023] 1. Inertial water bend; 2. Sludge removal valve; 3. Flue gas purification storage tank; 4. Demister; 5. Finned frustum heat exchanger; 6. Paraffin heat storage tank; 7. Variable cross-section heat exchange spiral tube; 7-1. Variable cross-section heat exchange spiral tube inlet; 7-2. Variable cross-section heat exchange spiral tube pipe; 7-3. Variable cross-section heat exchange spiral tube outlet; 1-1. Inlet high-temperature flue gas; 1-2. Dust carried by high-temperature flue gas settled due to inertia; 1-3. Purified high-temperature flue gas. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] As shown in the figure, this invention provides a small-scale biomass fuel paraffin heat storage greenhouse heating device with purification function, which consists of an inertial water bend pipe (1), a decontamination valve (2), a flue gas purification water storage tank (3), a demister (4), a ribbed frustum heat exchanger (5), a paraffin heat storage tank (6), and a variable cross-section heat exchange spiral tube (7). Flue gas enters the flue gas purification water storage tank (3) through the inertial water bend pipe (1), and after passing through the demister (4), it exchanges heat with the ribbed frustum heat exchanger (5), storing the heat in the paraffin in the paraffin heat storage tank (6), and finally exchanges heat with cold water in the variable cross-section heat exchange spiral tube (7) to produce hot water.

[0026] When the flue gas passes through the inertial water bend (1), due to the greater inertia of solid particles such as dust than gas, the flue gas will settle at the bottom of the bend and finally be discharged through the decontamination valve (2). When no flue gas passes through, due to pressure fluctuations, the flue gas purification water storage tank (3) will flow back into the water trap of the inertial water bend to prevent it from entering the flue gas inlet.

[0027] The demister (4) can separate excess moisture carried by the flue gas, which is conducive to the full heat transfer of high-temperature gas, improves heat transfer efficiency and saves water resources.

[0028] The inclined curved surface of the ribbed frustum heat exchanger (5) allows the water droplets generated after the high-temperature water vapor condenses and exchanges heat with the inclined curved surface to flow back to the flue gas purification water storage tank (3) to replenish water resources.

[0029] The paraffin heat storage tank (6) uses the paraffin stored inside to perform phase change heat storage. While exchanging heat with the variable cross-section heat exchange spiral tube (7) to generate hot water, it can also store a certain amount of heat, so as to realize the use of heat across time periods.

[0030] The inertial water bend (1) and the flue gas purification water storage tank (3) are connected. Water is introduced into the inertial water bend (1), and the decontamination valve (2) at the inertial water bend (1) is opened first to flush and clean the inertial water bend (1) with water. After completion, the decontamination valve (2) at the inertial water bend (1) is closed, and the decontamination valve (2) at the flue gas purification water storage tank (3) is opened to flush and clean the system with water. Then the decontamination valve (2) at the flue gas purification water storage tank (3) is closed to complete the cleaning of the system. When the system needs to replenish water, all decontamination valves (2) are closed, and water is introduced into the inertial water bend (1) until the water supply in the flue gas purification water storage tank (3) is sufficient, thereby achieving rapid cleaning of the system and rapid replenishment of water.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent changes or substitutions made by those skilled in the art within the technical scope, design concept and method disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A miniature biomass fuel paraffin thermal storage greenhouse heating device with purification function, characterized in that: The entire system consists of an inertial water bend (1), a decontamination valve (2), a flue gas purification storage tank (3), a demister (4), a ribbed frustum heat exchanger (5), a paraffin heat storage tank (6), and a variable cross-section heat exchange spiral tube (7). The flue gas enters the flue gas purification storage tank through the inertial water bend, passes through the demister, and exchanges heat with the ribbed frustum heat exchanger, storing the heat in the paraffin in the heat storage tank. Finally, it exchanges heat with the cold water in the variable cross-section heat exchange spiral tube to produce hot water. The inertial water bend (1) can utilize the difference in inertia between the gas and solid in the flue gas. The solid particles are deposited at the bottom of the bend and then removed by the decontamination valve (2), thus removing the solid particles. Furthermore, due to the presence of the bend, the water in the flue gas purification storage tank (3) cannot flow back when the pressure fluctuates, thus protecting the flue gas inlet. The use of a ribbed frustum heat exchanger increases the contact area between the fluid and the flow channel, thereby enhancing heat transfer. Simultaneously, the use of inclined surfaces to recover water achieves the goal of saving water resources. The paraffin in the paraffin heat storage tank (6) can store a large amount of heat through phase change heat storage, realizing energy supply and demand matching. Peak utilization; by setting a demister (4) between the flue gas purification water storage tank (3) and the ribbed frustum heat exchanger (5), large water droplets with lower temperature are recovered, making heat transfer more efficient and saving water resources; the variable cross-section heat exchange spiral tube (7) set in the paraffin heat storage tank (6) has a flow rate of fluid in the tube that matches the heat exchange capacity of the ribbed frustum heat exchanger, which can achieve efficient heat transfer; when cleaning the system, water is introduced into the inertial water bend (1), and the decontamination valve (2) at the inertial water bend (1) is opened first to clean the inertial water bend. The system is cleaned by flushing with water through the bend (1). After that, the decontamination valve (2) at the bend (1) is closed, and the decontamination valve (2) at the flue gas purification water storage tank (3) is opened to flush with water. Then the decontamination valve (2) at the flue gas purification water storage tank (3) is closed to complete the cleaning of the system. When the system needs to replenish water, the decontamination valve (2) is closed, and water is introduced into the bend (1) until the flue gas purification water storage tank (3) has sufficient water, thereby achieving rapid cleaning of the system and rapid replenishment of water.

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