Saturated water closed cycle structure

Abstract

The invention discloses a saturated water closed-loop circulation structure and belongs to the technical field of energy-saving heating, the saturated water closed-loop circulation structure comprises a combustion chamber providing a combustion place, a hot air pipeline is connected to the bottom of the combustion chamber through a pipeline, the hot air pipeline is U-shaped, and a preheating bin body is connected to the end, away from the combustion chamber, of the hot air pipeline through a pipeline; a heat pipe type air preheater is arranged in the preheating bin body, an air inlet of the heat pipe type air preheater is connected with an air blower through a pipeline, and an air outlet of the heat pipe type air preheater is connected with a preheating gas pipeline through a pipeline. By arranging the fin shell and tube heat exchanger and circulating saturated water through the high-temperature circulating pump, compared with traditional steam heating, the situation of heat loss caused by condensate water discharge is avoided, the heat utilization rate is effectively increased, hot waste gas generated by combustion heats to-be-mixed air, the hot waste gas is cooled and then discharged, and the energy consumption is reduced. The heat utilization rate is further improved, and heat pollution is avoided.

Description

Technical Field

[0001] This invention belongs to the field of energy-saving heating technology, specifically relating to a closed-loop saturated water circulation structure. Background Technology

[0002] A heat exchanger, or heat exchange equipment for short, is a device that transfers heat between two or more fluids, or between a fluid and a solid. Its core purpose is to transfer heat energy without mixing the media, in order to achieve process requirements such as heating, cooling, evaporation, condensation, or heat recovery. Its main principle is based on the second law of thermodynamics: heat always spontaneously flows from a higher temperature object to a lower temperature object. Due to its high energy efficiency and adaptability to diverse operating conditions, heat exchangers are widely used, primarily in the energy and power, petrochemical, HVAC, food and pharmaceutical, transportation, metallurgical, electronics, and aerospace industries.

[0003] In existing technologies, the heat source of heat exchange equipment is directly discharged after use, and the condensate from heat exchange is also directly discharged without forming a closed loop, resulting in low thermal utilization of the heat exchange equipment. Furthermore, existing technologies directly compress atmospheric air to assist combustion, but the compressed air temperature is low, resulting in incomplete combustion and increasing the total amount of pollutants in the exhaust gas. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an energy-saving heat exchange device.

[0005] The technical solution adopted to solve the above technical problems is: a saturated water closed-loop circulation structure, including a combustion chamber that provides a combustion site, a hot gas pipe connected to the bottom of the combustion chamber, the hot gas pipe being arranged in a "U" shape, and a preheating chamber connected to the pipe at the end away from the combustion chamber.

[0006] Through the above technical solution, the combustion chamber can mix the air mixed by the Venturi mixer with the fuel gas, and then fully mix the mixed gas. Heat can be transferred to the finned tube heat exchanger. The exhaust gas generated by combustion can be discharged through the hot gas pipeline. The exhaust gas can be discharged into the preheating chamber to preheat the combustion air.

[0007] The preheating chamber is equipped with a heat pipe air preheater. The air inlet of the heat pipe air preheater is connected to a blower via a pipe, and the air outlet of the heat pipe air preheater is connected to a preheating gas pipe via a pipe.

[0008] Through the above technical solution, the exhaust gas after combustion injected into the preheating chamber can heat the heat pipe air preheater, keeping the heat pipe air preheater at a high temperature. When the blower injects cold air into the heat pipe air preheater, it can heat the cold air, so that the gas entering the preheating gas pipeline maintains a certain temperature, which is convenient for mixing with the gas for complete combustion.

[0009] The combustion chamber is equipped with a finned tube heat exchanger for heat exchange.

[0010] Through the above technical solution, saturated water is filled into the finned tube heat exchanger. After the saturated water is heated, it can transfer heat and utilize the heat in the combustion chamber.

[0011] Furthermore, the preheating gas pipeline is connected to a Venturi mixer at the end away from the preheating chamber, a gas pipeline is connected to the inlet of the Venturi mixer, a gas valve assembly is connected to the gas pipeline, and the combustion chamber and the Venturi mixer are connected through a gas chamber.

[0012] Through the above technical solution, the Venturi mixer fully mixes the gas in the gas pipeline with the injected hot air and discharges it into the gas chamber, where it is burned in the re-combustion chamber, generating a large amount of heat. The heat acts on the finned tube heat exchanger and conducts the heat through the finned tube heat exchanger. The gas valve assembly can control the gas intake volume and intake cycle.

[0013] Furthermore, an electromagnetic valve is installed at the external pipe position of the finned tube heat exchanger, and a temperature and humidity sensor is installed at the electromagnetic valve position on the external pipe. The temperature and humidity sensor is connected to the blower via a wire, and the wire is electrically interlocked.

[0014] Through the above technical solutions, the solenoid valve can control the flow of saturated water in the finned tube heat exchanger to ensure heat transfer, and the temperature and humidity sensor can monitor the temperature in the finned tube heat exchanger to avoid the temperature being too low or too high.

[0015] Furthermore, the external pipe of the finned tube heat exchanger is connected to a heat-using device, and the external pipe is located on the side of the heat-using device away from the temperature and humidity sensor and is connected to a buffer tank.

[0016] Through the above technical solutions, the external pipes of the finned tube heat exchanger provide heat to the heat-using equipment, enabling the heat-using equipment to obtain a heat source and maintain normal operation. The buffer tank can reduce pressure fluctuations in the system and ensure stable equipment operation.

[0017] Furthermore, the external pipeline located between the buffer tank and the combustion chamber is connected to a high-temperature circulating pump for water circulation.

[0018] Through the above technical solution, the high-temperature circulating pump can circulate the saturated water in the finned tube heat exchanger, thereby achieving stable heat energy transfer.

[0019] Furthermore, the preheating chamber's air outlet is connected to a cold air exhaust pipe for discharging cold air.

[0020] Through the above technical solution, the cold air exhaust pipe can discharge the cooled hot air in the preheating chamber, avoiding the backflow of combustion exhaust gas and affecting normal combustion in the combustion chamber.

[0021] Furthermore, the gas pipeline is connected to the nozzle pipeline of the Venturi mixer, the preheated gas pipeline is connected to the vacuum chamber input pipeline of the Venturi mixer, and the gas chamber is connected to the expansion chamber pipeline of the Venturi mixer.

[0022] Through the above technical solution, the gas flow velocity increases at the nozzle position of the venturi mixer, generating greater pressure. When the gas flows to the vacuum chamber position, the gas flow velocity decreases, and the gas is fully mixed through the pressure difference. After the hot air and gas are fully mixed, ignition can quickly and completely burn the gas.

[0023] The beneficial effects of the present invention are as follows: (1) The present invention sets up a finned tube heat exchanger and circulates saturated water through a high-temperature circulating pump. When the saturated water is heated in the combustion chamber, it can be heated and pumped into the heat-using equipment to provide heat energy. After the saturated water is cooled down, it is buffered in the buffer tank under the action of the high-temperature circulating pump and then discharged into the finned tube heat exchanger in the combustion chamber for further heating. Compared with traditional steam heating, the situation of heat loss caused by condensate discharge is avoided, and the heat utilization rate is effectively improved. (2) The present invention sets up a preheating chamber at the end of the hot gas pipeline. The cold air compressed by the blower is preheated in the heat pipe air preheater through the hot exhaust gas. The compressed air is mixed with the gas after preheating, so that the gas has high combustion efficiency and complete combustion when it is burned. It also effectively controls the emission of waste. The hot exhaust gas is further heat exchanged and then discharged, which can make full use of heat energy and avoid heat pollution. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a closed-loop saturated water circulation structure according to the present invention.

[0025] Reference numerals: 1. Gas pipeline; 2. Gas valve assembly; 3. Preheated gas pipeline; 4. Preheating chamber; 5. Heat pipe air preheater; 6. Blower; 7. Hot gas pipeline; 8. Cold gas exhaust pipeline; 9. Finned tube heat exchanger; 10. Combustion chamber; 11. High-temperature circulating pump; 12. Buffer tank; 13. Heat-using equipment; 14. Venturi mixer; 15. Gas chamber; 16. Interlock; 17. Temperature and humidity sensor. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] like Figure 1 As shown, a saturated water closed-loop circulation structure in this embodiment includes a combustion chamber 10 that provides a combustion field. A hot gas pipe 7 is connected to the bottom of the combustion chamber 10, and the hot gas pipe 7 is arranged in a "U" shape. The end of the pipe away from the combustion chamber 10 is connected to a preheating chamber 4. The combustion chamber 10 can mix the air mixed by the venturi mixer 14 with the fuel gas. After the mixed gas is fully mixed, heat can be transferred to the finned tube heat exchanger 9. The exhaust gas generated by combustion can be discharged through the hot gas pipe 7. The exhaust gas discharged into the preheating chamber 4 can preheat the combustion air.

[0028] The preheating chamber 4 has a cold air exhaust pipe 8 connected to the air outlet. The cold air exhaust pipe 8 can discharge the cooled hot air in the preheating chamber 4 to prevent the combustion exhaust gas from flowing back and affecting the normal combustion in the combustion chamber 10.

[0029] The preheating chamber 4 is equipped with a heat pipe air preheater 5. The air inlet of the heat pipe air preheater 5 is connected to a blower 6 via a pipe, and the air outlet of the heat pipe air preheater 5 is connected to a preheating gas pipe 3 via a pipe. The exhaust gas after combustion that is injected into the preheating chamber 4 can heat the heat pipe air preheater 5, keeping it at a high temperature. When the blower 6 injects cold air into the heat pipe air preheater 5, it can heat the cold air, so that the gas entering the preheating gas pipe 3 can maintain a certain temperature, which is convenient for mixing with the fuel gas for complete combustion.

[0030] The preheating gas pipeline 3 is connected to a Venturi mixer 14 at the end away from the preheating chamber 4. The inlet of the Venturi mixer 14 is connected to a gas pipeline 1, and a gas valve assembly 2 is connected to the gas pipeline 1. The combustion chamber 10 and the Venturi mixer 14 are connected through a gas chamber 15. The Venturi mixer 14 fully mixes the gas in the gas pipeline 1 with the injected hot air and discharges it into the gas chamber 15. The gas then burns in the combustion chamber 10, generating a large amount of heat. The heat acts on the finned tube heat exchanger 9 and conducts heat through the finned tube heat exchanger 9. The gas valve assembly 2 can control the gas intake volume and intake cycle.

[0031] Gas pipeline 1 is connected to the nozzle pipeline of Venturi mixer 14, preheated gas pipeline 3 is connected to the vacuum chamber input pipeline of Venturi mixer 14, and gas chamber 15 is connected to the expansion chamber pipeline of Venturi mixer 14. The gas flow velocity increases at the nozzle position of Venturi mixer 14, generating greater pressure. When it flows to the vacuum chamber position, the gas flow velocity decreases, and the gas is fully mixed through pressure difference. After the hot air and gas are fully mixed, ignition can quickly and completely burn the gas.

[0032] The combustion chamber 10 is equipped with a finned tube heat exchanger 9 for heat exchange. The finned tube heat exchanger 9 is filled with saturated water. After the saturated water is heated, it can transfer heat and utilize the heat in the combustion chamber 10.

[0033] A solenoid valve is installed at the external pipe of the finned tube heat exchanger 9, and a temperature and humidity sensor 17 is installed at the location of the solenoid valve. The temperature and humidity sensor 17 is connected to the blower 6 by a wire, and the wire is electrically connected to an interlock 16. The solenoid valve can control the flow of saturated water in the finned tube heat exchanger 9 to ensure heat transfer, and the temperature and humidity sensor 17 can monitor the temperature in the finned tube heat exchanger 9 to prevent the temperature from being too low or too high.

[0034] The external pipe of the finned tube heat exchanger 9 is connected to the heat-using equipment 13. The external pipe is located on the side of the heat-using equipment 13 away from the temperature and humidity sensor 17. The pipe is connected to the buffer tank 12. The external pipe of the finned tube heat exchanger 9 provides heat to the heat-using equipment 13, so that the heat-using equipment 13 obtains a heat source and maintains normal operation. The buffer tank 12 can reduce pressure fluctuations in the system and ensure stable operation of the equipment.

[0035] An external pipeline is located between the buffer tank 12 and the combustion chamber 10. The pipeline is connected to a high-temperature circulating pump 11 for water circulation. The high-temperature circulating pump 11 can circulate the saturated water in the finned tube heat exchanger 9 to achieve stable heat energy transfer.

[0036] The working principle of this embodiment is as follows: First, the blower 6 is started, and compressed cold air is injected into the heat pipe air preheater 5 through the blower 6. The compressed cold air is preheated by the heat pipe air preheater 5. The preheated hot air is transported to the Venturi mixer 14 through the preheated gas pipeline 3 and is fully mixed with the gas transported by the gas pipeline 1. After mixing, the gas enters the gas chamber 15 and is further transported to the combustion chamber 10 for complete combustion. The large amount of heat energy generated by combustion can act on the finned tube heat exchanger 9, which heats the saturated water inside the finned tube heat exchanger 9. The saturated water is transferred to the heat-using equipment 13 through an external pipeline to ensure the normal operation of the heat-using equipment 13. The saturated water flows into the buffer tank 12 for buffering, and then is transported to the finned tube heat exchanger 9 by the high-temperature circulating pump 11 for further heating. The temperature of the saturated water delivered to the heat-using equipment 13 is monitored by the temperature and humidity sensor 17, thereby controlling the air volume of the blower 6 to achieve the purpose of temperature control. The exhaust gas generated by combustion in the combustion chamber 10 is discharged through the hot air pipe 7 and discharged into the preheating chamber 4 to heat the heat pipe air preheater 5. This preheats the compressed air entering the heat pipe air preheater 5, which can further improve the heat utilization rate and reduce the temperature of the exhaust gas, thus effectively avoiding thermal pollution.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A saturated water closed-loop circulation structure, comprising a combustion chamber (10) providing a combustion site, characterized in that: The bottom of the combustion chamber (10) is connected to a hot air pipe (7), and the hot air pipe (7) is arranged in a "U" shape, with the end of the pipe away from the combustion chamber (10) connected to a preheating chamber (4). The preheating chamber (4) is equipped with a heat pipe air preheater (5). The air inlet of the heat pipe air preheater (5) is connected to a blower (6) through a pipe, and the air outlet of the heat pipe air preheater (5) is connected to a preheating gas pipe (3). The combustion chamber (10) is equipped with a finned tube heat exchanger (9) for heat exchange.

2. The saturated water closed-loop circulation structure according to claim 1, characterized in that, The preheating gas pipeline (3) is connected to a Venturi mixer (14) at one end away from the preheating chamber (4). The inlet of the Venturi mixer (14) is connected to a gas pipeline (1). The gas pipeline (1) is connected to a gas valve assembly (2). The combustion chamber (10) and the Venturi mixer (14) are connected through a gas chamber (15).

3. The saturated water closed-loop circulation structure according to claim 1, characterized in that, The finned tube heat exchanger (9) is equipped with an external pipe with a solenoid valve, and a temperature and humidity sensor (17) is installed at the position of the external pipe and the solenoid valve. The temperature and humidity sensor (17) is connected to the blower (6) by a wire, and the wire is electrically connected to an interlock (16).

4. The saturated water closed-loop circulation structure according to claim 3, characterized in that, The external pipe of the finned tube heat exchanger (9) is connected to a heat-using device (13), and the external pipe is located on the side of the heat-using device (13) away from the temperature and humidity sensor (17) and is connected to a buffer tank (12).

5. A saturated water closed-loop circulation structure according to claim 4, characterized in that, The external pipeline is located between the buffer tank (12) and the combustion chamber (10), and is connected to a high-temperature circulating pump (11) for water circulation.

6. The saturated water closed-loop circulation structure according to claim 1, characterized in that, The preheating chamber (4) has a cold air discharge pipe (8) connected to the air outlet.

7. A saturated water closed-loop circulation structure according to claim 2, characterized in that, The gas pipeline (1) is connected to the nozzle pipeline of the Venturi mixer (14), the preheated gas pipeline (3) is connected to the vacuum chamber input pipeline of the Venturi mixer (14), and the gas chamber (15) is connected to the expansion chamber pipeline of the Venturi mixer (14).

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