Efficient oxygen generation system capable of realizing heat exchange and energy recovery

Abstract

The utility model discloses an efficient oxygen generation system capable of realizing heat exchange and energy recovery, which relates to the technical field of oxygen generation equipment and comprises an air compressor, a gas filter, an adsorption tower, a heat exchange component and an energy recovery component. Air is subjected to three-layer filtration by a gas filter and then enters a compressor, compressed air enters an adsorption tower, and a nitrogen strong adsorption molecular sieve is used for oxygen production. Waste gas of the adsorption tower is guided into the heat exchange component, cold air and hot waste gas are subjected to efficient heat exchange through a copper pipe and a spiral turbulent flow metal sheet in the heat exchange component, preheated air is recycled, and the waste gas subjected to heat exchange enters the energy recovery component to drive a turbine to drive a generator to generate electricity. Impurities in air are effectively removed, oxygen production purity and stable operation of equipment are guaranteed, energy consumption is greatly reduced through heat exchange and energy recovery, and the energy utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen -making equipment technical field, concretely relates to a kind of high -efficient oxygen -making system for realizing heat exchange and energy recovery. BACKGROUND

[0002] In industrial production, medical care, aerospace and many other fields, the preparation and supply of oxygen play a vital role. For example, in the steel smelting process, sufficient oxygen supply can improve combustion efficiency and reduce energy consumption. The demand for oxygen is rising, and higher requirements are placed on the efficiency, energy consumption and stability of the oxygen production system. Traditional oxygen production methods such as cryogenic method and pressure swing adsorption method have been continuously developed in long-term application, but there is still much room for improvement in energy utilization and heat recovery.

[0003] The existing oxygen production system also has some shortcomings. The heat exchange efficiency of most traditional oxygen production devices is low. The exhaust gas discharged from the adsorption tower contains a large amount of heat, which is often directly discharged into the environment, causing serious energy waste. Moreover, the existing heat exchanger has a simple structure and limited heat exchange area, which cannot fully utilize the heat of the exhaust gas to preheat the cold air entering the system, so that the air compressor needs to consume more energy to compress the air, increasing the energy consumption of the entire oxygen production system. For example, in some industrial oxygen production scenarios, due to insufficient heat exchange, the energy consumption of the air compressor is high, increasing the production cost of enterprises and reducing economic benefits. SUMMARY

[0004] To solve the above problems, the utility model provides a kind of high -efficient oxygen -making system for realizing heat exchange and energy recovery, including air compressor, air compressor gas outlet is connected with adsorption tower, and nitrogen gas strong adsorption molecular sieve is installed in adsorption tower;The exhaust gas outlet end of the adsorption tower is connected with a heat exchange component, the heat exchange component includes a cylindrical metal shell, the end of the metal shell close to the adsorption tower is connected with a cold air inlet pipe and a hot exhaust gas inlet pipe through flange, the end of the metal shell away from the adsorption tower is connected with an air flow guide pipe and a waste gas recovery pipe through flange, the hot exhaust gas inlet pipe is connected with the exhaust gas outlet end of the adsorption tower, for receiving hot exhaust gas, copper pipe is installed in the metal shell, copper pipe is connected with cold air inlet pipe, for conveying cold air to be heat exchanged, turbulence metal sheet is welded on the outer side wall of copper pipe, and the turbulence metal sheet is arranged in spiral shape along the axial direction of copper pipe;Energy recovery component is arranged on one side of heat exchange component.

[0005] Further, the energy recovery component includes a turbine and a generator, the turbine inlet is connected with the waste gas recovery pipe, the shaft end of the turbine is connected with a transmission shaft through a coupling, and the rotor of the generator is connected with the transmission shaft through a transmission key.

[0006] Further, the air compressor is connected with a gas filter at the air inlet, and the air guide pipe is connected with the air inlet of the gas filter.

[0007] Further, the gas filter comprises three layers, and the outer layer is connected with a stainless steel mesh, the middle layer is connected with a glass fiber filter paper, and the inner layer is connected with an activated carbon adsorption layer.

[0008] Further, the spoiler metal sheet is a copper sheet.

[0009] The utility model has the advantages of the following:

[0010] 1, the spoiler metal sheet is welded on the outer side wall of the copper pipe in a spiral shape, when the hot waste gas flows in the metal shell, the spoiler metal sheet makes the hot waste gas form turbulent flow, greatly increases the contact area and contact time of the hot waste gas and the cold air in the copper pipe.

[0011] 2, after the waste gas enters the turbine, the turbine is driven to rotate, and the generator is driven to generate electricity, and the energy in the waste gas is converted into electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole internal structure schematic view of the utility model.

[0013] The reference signs are explained as follows: 1, air compressor; 2, adsorption tower; 301, metal shell; 302, cold air inlet pipe; 303, hot waste gas inlet pipe; 304, air guide pipe; 305, waste gas recovery pipe; 306, copper pipe; 307, spoiler metal sheet; 401, turbine; 402, transmission shaft; 403, generator; 5, gas filter. DETAILED DESCRIPTION

[0014] In the description of the utility model, it is necessary to explain that the orientation or positional relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or positional relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying the importance of the opposite.

[0015] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0016] The utility model will be further described below in conjunction with the drawings of the specification:

[0017] A kind of high-efficiency oxygen generating system for realizing heat exchange and energy recovery, as shown in Figure 1 Air compressor 1 is connected with gas filter 5 at the air inlet of air compressor 1, gas filter 5 includes three layers, from outside to inside, stainless steel mesh, glass fiber filter paper and activated carbon adsorption layer, respectively, air compressor 1 is connected with adsorption tower 2 at the air outlet, nitrogen strong adsorption molecular sieve is installed in adsorption tower 2.

[0018] Among them, the three-layer structure of gas filter 5 can effectively remove impurities in air, such as stainless steel mesh to block large particles, glass fiber filter paper to filter out small particles, activated carbon adsorption layer to remove harmful gases and moisture, to ensure that the air entering the system is pure, to protect the subsequent equipment and improve the oxygen production quality; molecular sieve in adsorption tower 2 precisely adsorbs nitrogen, and efficiently prepares oxygen-rich gas.

[0019] As shown in Figure 1As shown, in this embodiment, the waste gas outlet end of the adsorption tower 2 is connected with a heat exchange component, the heat exchange component includes a cylindrical metal shell 301, one end of the metal shell 301 close to the adsorption tower 2 is connected with a cold air inlet pipe 302 and a hot waste gas inlet pipe 303 through flanges, the end of the metal shell 301 far away from the adsorption tower 2 is connected with an air guide pipe 304 and a waste gas recovery pipe 305 through flanges, the hot waste gas inlet pipe 303 is connected with the waste gas outlet end of the adsorption tower 2, for receiving hot waste gas, a copper pipe 306 is installed in the metal shell 301, the copper pipe 306 is connected with the cold air inlet pipe 302, for conveying cold air to be heat exchanged, the outer side wall of the copper pipe 306 is welded with a spiral turbulence metal sheet 307, the spiral turbulence metal sheet 307 is arranged in a spiral shape along the axial direction of the copper pipe 306, and the spiral turbulence metal sheet 307 can be selected from copper sheets; the air guide pipe 304 is connected with the gas inlet of the gas filter.

[0020] Wherein, the hot waste gas enters the metal shell 301 through the hot waste gas inlet pipe 303, exchanges heat with the cold air in the copper pipe 306, the spiral turbulence metal sheet 307 increases the contact area and the turbulence degree, and the heat exchange efficiency is strengthened, so that the cold air is preheated efficiently, the energy consumption of the air compressor 1 is reduced, and the energy is saved; the air guide pipe 304 sends the heat-exchanged air back to the gas filter for purification again, ensures the air quality in the system, prolongs the service life of the equipment, reduces the maintenance cost, improves the stability and reliability of the system, and the advantages are obvious especially in the long-term continuous operation of the oxygen production scene.

[0021] As shown in the figure, Figure 1 In this embodiment, one side of the heat exchange component is provided with an energy recovery component, the energy recovery component includes a turbine 401 and a generator 403, the gas inlet of the turbine 401 is connected with the waste gas recovery pipe 305, one end of the shaft of the turbine 401 is connected with a transmission shaft 402 through a shaft coupling, and the rotor of the generator 403 is connected with the transmission shaft 402 through a transmission key.

[0022] Wherein, the heat-exchanged waste gas enters the turbine 401 to drive it to rotate, drives the rotor of the generator 403 to generate electricity through the transmission shaft 402, the recovered electric energy can be used for other equipment in the system or feedback to the power grid, reduces the input of external energy, and reduces the operation cost, such as in industrial oxygen production, can significantly save electricity expenses, at the same time, reduces the waste gas emission heat, reduces the environmental heat load, has good economic and environmental benefits, and enhances the market competitiveness and sustainable development ability of the system.

[0023] The working principle of the utility model is as follows:

[0024] Air enters the air compressor 1 through the gas filter 5. The gas filter 5 is composed of a stainless steel mesh, a glass fiber filter paper and an activated carbon adsorption layer from outside to inside. The stainless steel mesh preliminarily blocks larger particulate impurities, the glass fiber filter paper further filters small particles, and the activated carbon adsorption layer removes harmful gases and moisture in the air. The clean air after three layers of filtration enters the air compressor 1.

[0025] In the adsorption tower 2, nitrogen strong adsorption molecular sieves are installed. The nitrogen in the air is adsorbed and separated by using the selective adsorption characteristics of the molecular sieve, so as to obtain oxygen-rich gas. The exhaust gas discharged from the adsorption tower 2 contains a certain amount of heat, which enters the metal shell 301 of the heat exchange component through the hot exhaust gas inlet pipe 303.

[0026] At the same time, the cold air from the outside enters the copper pipe 306 in the heat exchange component through the cold air inlet pipe 302. The copper pipe 306 is welded with a spiral turbulence metal sheet 307 (copper sheet can be selected according to actual cost) on the outer wall. When the hot exhaust gas flows in the metal shell 301, it exchanges heat with the cold air in the copper pipe 306. The spiral structure of the turbulence metal sheet 307 forms a turbulent flow of the hot exhaust gas in the metal shell 301, increases the contact area and contact time of the hot exhaust gas with the copper pipe 306, and greatly improves the heat exchange efficiency, so that the cold air is fully preheated. The turbulence metal sheet 307 can be selected as copper sheet according to actual cost. Copper itself has good heat conduction performance, and the spiral copper sheet can play the dual role of enhancing heat exchange and turbulence. When the hot exhaust gas flows through the spiral copper sheet, the airflow will produce turbulence, and the copper sheet can quickly conduct heat from the hot exhaust gas to the internal copper pipe 306. Compared with the combination of spiral metal sheet and copper plate alone, the heat exchange efficiency is further improved.

[0027] After the preheated air flows out of the copper pipe 306, it enters the gas filter 5 through the air guide pipe 304 for purification treatment again to enter the subsequent circulating air.

[0028] The exhaust gas after heat exchange in the heat exchange component enters the turbine 401 of the energy recovery component through the exhaust gas recovery pipe 305. The flow of the exhaust gas drives the impeller of the turbine 401 to rotate. The shaft end of the turbine 401 is connected to a transmission shaft 402 through a shaft coupling. The rotor of the generator 403 is connected to the transmission shaft 402 through a transmission key. Therefore, the rotation of the turbine 401 drives the transmission shaft 402 to rotate, and then drives the rotor of the generator 403 to rotate, converting the energy of the exhaust gas into electrical energy, realizing energy recovery. The recovered electrical energy can be used for other electrical equipment in the system or fed back to the power grid.

[0029] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A high-efficiency oxygen generation system for heat exchange and energy recovery, comprising an air compressor (1), an adsorption tower (2) connected to the air compressor (1), and nitrogen strongly adsorbed molecular sieves installed in the adsorption tower (2); characterized in that: The waste gas outlet end of the adsorption tower (2) is connected with a heat exchange component, the heat exchange component comprises a cylindrical metal shell (301), one end of the metal shell (301) close to the adsorption tower (2) is connected with a cold air inlet pipe (302) and a hot waste gas inlet pipe (303) through flanges, the end of the metal shell (301) away from the adsorption tower (2) is connected with an air guide pipe (304) and a waste gas recovery pipe (305) through flanges, the hot waste gas inlet pipe (303) is connected with the waste gas outlet end of the adsorption tower (2) and used for receiving hot waste gas, a copper pipe (306) is installed in the metal shell (301), the copper pipe (306) is connected with the cold air inlet pipe (302) and used for conveying cold air to be heat exchanged, a turbulence metal sheet (307) is welded to the outer side wall of the copper pipe (306), and the turbulence metal sheet (307) is arranged in a spiral shape along the axial direction of the copper pipe (306); an energy recovery component is arranged on one side of the heat exchange component.

2. The high-efficiency oxygen generation system of claim 1, wherein: The energy recovery component comprises a turbine (401) and a generator (403), the air inlet of the turbine (401) is connected with the waste gas recovery pipe (305), and the shaft end of the turbine (401) is connected with a transmission shaft (402) through a shaft coupling; the rotor of the generator (403) is connected with the transmission shaft (402) through a transmission key.

3. The high-efficient oxygen generation system of claim 1, wherein: The air compressor (1) is connected with a gas filter (5) at the air inlet, and the air guide pipe (304) is connected with the air inlet of the gas filter.

4. The high-efficiency oxygen generation system of claim 3, wherein: The gas filter (5) comprises three layers, and from outside to inside, the three layers are connected with a stainless steel mesh, a glass fiber filter paper and an activated carbon adsorption layer.

5. The high-efficient oxygen generation system of claim 1, wherein: The turbulence metal sheet (307) is a copper sheet.

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